A/Prof Saurabh Kumar

Cardiologist & Electrophysiologist
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A/Prof Saurabh Kumar

BSc(Med) & MBBS, PhD, FRACP, FCSANZ, FHRS

Cardiologist & Interventional Electrophysiologist

A/Prof Saurabh Kumar is a leading expert in the diagnosis and treatment of heart rhythm disorders (arrhythmias), and is one of the highest volume specialists for AF in Sydney and the highest volume operator for VT/PVC ablations in Australia.

A/Prof Kumar is an eminently experienced cardiologist and interventional (procedural) electrophysiologist. He is a nationally and internationally recognised clinician-scientist with seminal contributions to the field of electrophysiology and heart disease, with over 290+ peer-reviewed publications in top tier international cardiology journals.

A/Prof Kumar specialises in the management of complex heart rhythm disorders such as atrial fibrillation (AF), supraventricular tachycardia (SVT), ventricular tachycardia (VT), premature ventricular contractions (PVCs), as well as cardiac device implantation (pacemakers / defibrillators). He is one of the highest volume specialist for AF in Sydney and the highest volume operations for VT/PVC ablations.

He combines elite training from prestigious global institutions – including Harvard Medical School, Brigham and Women’s Hospital, and the University of Melbourne – with his extensive clinical and academic background. A/Prof Kumar often enjoys first-in-the-world access to the latest cardiac mapping, catheter ablation and cardiac implanted device technologies, allowing him to deliver world-class, personalised care to his patients.

A/Prof Kumar holds numerous clinical, academic and directorship appointments:

  • Staff Specialist Cardiologist and Cardiac Electrophysiologist at Westmead Hospital, Sydney
  • Clinical Associate Professor of Medicine at the University of Sydney
  • Director, Complex Arrhythmia Research Program, Westmead Hospital
  • Translational Electrophysiology Lead, Westmead Applied Research Centre (WARC), University of Sydney
  • Built Sydney’s premier clinical electrophysiology and PhD training program.
  • Supervised 7 PhD and 2 Master’s students to completion.
  • Hosted 4 international postdoctoral fellows (India, Japan, Hong Kong, Australia).
  • Currently supervising 3 PhD candidates
  • He has performed over 3,000+ catheter ablation procedures for atrial fibrillation (AF) to-date.
  • He has performed over 2,000+ catheter ablations for ventricular tachycardia (VT) and, premature ventricular contractions (PVCs) to-date.
  • He performs ~200 AF and ~200 VT/PVC ablations annually, making him one of the highest volume specialists in Australia.
  • Has implanted over 2,000+ cardiac devices to-date and follows over 1,000+ patients in his device clinic.
  • He is frequently referred complex arrhythmia patients from GPs, cardiologists, and other electrophysiologists from across Sydney, NSW, interstate and internationally.

A/Prof Kumar is a leading clinician-scientist in electrophysiology with seminal contributions to the field of AF, VT and genetic heart disease research. He has:

  • Over 280+ peer-reviewed publications in top tier cardiology journals
  • Written book chapters in every recent edition of the “bible” of Electrophysiology, “Zipes: From Cell to Bedside”
  • More than 8,000+ academic citations
  • Won > $16 million in competitive grant funding, including:
    • National Health and Medical Research Council (NHMRC)
    • National Heart Foundation
    • Western Sydney Local Health District
    • American Heart Association
    • Viertel Foundation
    • Perpetual Ramaciotti
  • One of Australia’s most experienced specialist in Atrial Fibrillation (AF) ablation – with over 3,000+ catheter ablation procedures performed in total, and an average of ~200 cases performed per year.
  • One of Australia’s most experienced specialist in Ventricular Tachycardia (VT) ablation – with over 2,000+ catheter ablation procedures performed in total, and ~200 cases performed per year.
  • One of Australia’s most experienced cardiac device implanters – having completed over 2,000+ pacemaker and defibrillator implants in total, and currently managing more than 500+ patients in clinic.
  • Extensive experience in arrhythmia care – having treated over 10,000+ patients with heart rhythm disorders.
  • Specialist in genetic heart conditions – with over 1,000+ patients treated with inherited arrhythmia syndromes.
  • Pioneer of advanced arrhythmia services in Australia, including:
    • One of Australia’s first 24/7 ventricular arrhythmia ablation programs, accepting referrals statewide and nationwide.
    • Australia’s first rapid-access arrhythmia clinic at Westmead Public Hospital.
    • Western Sydney’s first cardiac arrhythmia genetics clinic (Westmead Public and Private Hospitals).
  • National expert in cardiac sarcoidosis – overseeing one of the largest patient cohorts in the country.
  • Committed to continuity of care – providing specialised management for young adults with genetic heart disease transitioning from Westmead Children’s Hospital.
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Personal Q&As

My journey into cardiology was deeply personal. I was inspired by the sudden cardiac death of my grandfather, an event that left a lasting impression and sparked a lifelong dedication to preventing similar tragedies in others. As I progressed through medical training, I was drawn to the precision and complexity of the heart’s electrical system. This fascination evolved into a deep passion for cardiac electrophysiology – the study and treatment of heart rhythm disorders.

What captivated me most was the elegant flow of electrical currents within the heart, maintaining a delicate balance that sustains life. When that balance is disrupted, the consequences can be profound – but the solutions, when applied with expertise, can be life-changing.

Today, I find immense fulfilment not just in performing advanced procedures like catheter ablation and pacemaker / defibrillator implantation, but also in the trusted relationships I build with patients and their families. Helping individuals recover from serious arrhythmias and return to full, active lives is a privilege I never take for granted.

My favourite procedure is catheter ablation for complex heart rhythm disorders, particularly atrial fibrillation (AF) and ventricular tachycardia (VT). These conditions often cause years – or even decades – of debilitating symptoms, impacting patients’ quality of life, confidence, and wellbeing. Many of my patients have not had access to experts in catheter ablation and have suffered with their arrhythmias for decades.

To be able to pinpoint and eliminate the source of an arrhythmia in a single procedure, and watch someone reclaim their health within hours, is profoundly rewarding. The moment a patient says, “I finally feel normal again,” is why I do what I do. Restoring someone’s life – and in some cases, preventing sudden cardiac death – is a privilege I never take for granted.

I’ve been fortunate to learn from some of the world’s leading electrophysiologists, each of whom shaped my career and clinical philosophy:

  • Professors David Ross and Pramesh Kovoor ignited my passion for electrophysiology during my early training at Westmead Hospital, Sydney.
  • Professor Jonathan Kalman at the Royal Melbourne Hospital transformed the way I approached and understood electrophysiology at a clinical and academic level. His mentorship continues to guide my clinical, research, and leadership roles to this day.
  • During my Harvard fellowship at Brigham and Women’s Hospital, I was trained by global experts in complex arrhythmias especially ventricular arrhythmias – Professors William G. Stevenson, Gregory F. Michaud, Roy M. John, and Usha B. Tedrow. Their teachings and mentorship equipped me to lead Australia’s most advanced VT ablation program today.

It was the evening before Good Friday. A young father recovering from a recent heart attack suddenly entered electrical storm – a catastrophic state with 30 cardiac arrests due to ventricular tachycardia (VT) in one night, each requiring CPR (cardiopulmonary resuscitation) and external shocks. Without urgent catheter ablation, death was inevitable.

Despite the long weekend, a dedicated team of over 20 volunteers – including three anaesthetists, intensive care unit staff, nurses, technicians, and cardiologists – rallied within the hour. We placed the patient on a heart-lung machine and performed emergency VT ablation through the night.

By 6am, he was alive.

A few days later, he walked out of hospital to return to his children and family. That memory is a powerful reminder of:

  • The life-saving potential of VT ablation
  • The incredible teamwork and expertise required in cardiac electrophysiology
  • The deep emotional rewards of this field

That same morning was also my wife’s birthday. Watching the sunrise with her over coffee after made my day extra special.

When I’m not in the lab or clinic, I love:

  • Playing cricket, golf, and lifting weights.
  • Gardening and woodworking – I could spend hours in the shed or yard.
  • Most of all, I enjoy family time – firing up the barbeque, having a drink, and making memories with my wife, children, and extended family in the backyard.

Qualifications

  • Fellow of the Heart Rhythm Society (FHRS), 2019
  • Fellow of the Cardiac Society of Australia & New Zealand (FCSANZ), 2011
  • Fellow of the Royal Australasian College of Physicians (FRACP), 2011
  • Doctor of Philosophy (PhD), University of Melbourne, 2013
  • Registrar Training: Westmead Hospital (2006-2010)
  • Bachelor of Medicine & Bachelor of Surgery, MBBS (Hons), UNSW, 2003
  • Bachelor of Science (Medical Science), BSc(Med), UNSW, 2003

Fellowship Training

  • Cardiac Electrophysiology Fellowship, The Royal Melbourne Hospital (2010-2013)
  • Advanced Cardiac Electrophysiology Fellowship. Brigham and Women’s Hospital, Harvard Medical School, USA (2013-2016)

Professional Appointments

  • Clinical Associate Professor of Medicine, University of Sydney
  • Program Lead, Ventricular Arrhythmias and Sudden Cardiac Death, Westmead Hospital
  • Staff Specialist Cardiologist, Westmead Hospital
  • Electrophysiology section editor: Heart Lung & Circulation, Internal Medicine Journal
  • Section editor Atrial fibrillation: Heart Rhythm O2 Journal
  • Section editor Ventricular Arrhythmias: Journal of Interventional Cardiac Electrophysiology
  • Editorial Board Member: Journal of the American College of Cardiology Clinical Electrophysiology, Pacing and Clinical Electrophysiology
  • Writing committee member – international guidelines on VT ablation, VT ablation endpoints, management of VT/VF storm

Memberships

  • Cardiac Society of Australia and New Zealand
  • Royal Australian College of Physicians
  • Heart Rhythm Society

Consulting Locations

Hospital Accreditations

  • Westmead Public Hospital
  • Westmead Private Hospital

Awards

  • Highest Ranked Clinical Scholar for the National Heart Foundation Postgraduate Research Scholarship for PhD (2010)
  • National Heath & Medical Research Council Postgraduate Scholarship for PhD (2010-2013)
  • McCaughey Research Scholarship, Royal Australasian College of Physicians (2011)
  • Royal Australian Dean’s Award for most outstanding PhD thesis, University of Melbourne (2013)
  • Prestigious Ralph Reader Prize, Cardiac Society of ANZ (2012)
  • Neil Hamilton Fairley Early Career Fellowship Award for training at Harvard Medical School, National Heath & Medical Research Council (2013-16)
  • National Heart Foundation Overseas Fellowship Award (2013-16)
  • Bushell Travelling Fellowship, Royal Australian College of Physicians, for Postdoctoral fellowship at Harvard Medical School (2013)
  • American Heart Association Postdoctoral Fellowship (2015-16)
  • Eric N. Prystowsky Early Career Research Award (runner up, 2014)
  • Heart Rhythm Journal, Heart Rhythm Society Best Paper of the Year (Runner up, 2012)
  • Ross Hoenen Award for number 1 ranked application for the National Heart Foundation Vanguard Grant (2019)

Leadership roles

  • Chair, Heart Rhythm Council, Cardiac Society of ANZ, 2018-2020
  • Program Lead, Ventricular Arrhythmias and Sudden Cardiac Death, Westmead Hospital
  • Electrophysiology section editor: Heart Lung & Circulation, Internal Medicine Journal
  • Section editor Atrial fibrillation: Heart Rhythm O2 Journal
  • Section editor Ventricular Arrhythmias: Journal of Interventional Cardiac Electrophysiology
  • Editorial Board Member: Journal of the American College of Cardiology Clinical Electrophysiology, Pacing and Clinical Electrophysiology

In the Media and On the Web:

Link to A/Prof Kumar’s academic profile, University of Sydney:

https://www.sydney.edu.au/medicine-health/about/our-people/academic-staff/saurabh.kumar.html

Top 5 Impact Publications

1. Kumar S, et al. Long-Term Arrhythmic and Nonarrhythmic Outcomes of Lamin A/C Mutation Carriers. Journal of the American College of Cardiology. 2016. https://pubmed.ncbi.nlm.nih.gov/27884249/. This seminal paper, was one of the first to describe the natural history of lamin cardiomyopathy, a genetic heart disease. It is cited over 300+ times by other researchers, and incorporated in international heart rhythm guidelines.

2. Kumar S, et al.. Ventricular tachycardia in cardiac sarcoidosis: characterization of ventricular substrate and outcomes of catheter ablation. Circulation Arrhythmia and Electrophysiology. 2015. https://pubmed.ncbi.nlm.nih.gov/25527825/. This seminal paper, was one of the first to describe the cardiac mapping features and catheter ablation outcomes for sarcoid heart disease. It is cited over 200+ times by other researchers, and incorporated in international heart rhythm guidelines.

3. Turnbull S, Kumar S et al. Utility of a Handheld, Single-Lead ECG Device for Diagnosis of Cardiac Arrhythmias. Journal of the American College of Cardiology. 2023. This pioneering randomised trial paved the way for the use of wearables and commercial handheld devices in diagnosis and treatment of heart rhythm disorders.

4. John RM, Kumar S. Sinus Node and Atrial Arrhythmias. Circulation. 2016. A seminal review article on how sinus node dysfunction leads to atrial fibrillation, and management strategies for both conditions. Cited over 200+ cites by other researchers.

5. Kumar S, et al. Long-term outcomes after catheter ablation of ventricular tachycardia in patients with and without structural heart disease. Heart Rhythm. 2016. This seminal paper describes the outcomes of ventricular tachycardia ablation in various disease substrates, and is cited over 150+ times by other researchers.

Research Highlights

  • Established Sydney’s premier clinical cardiac electrophysiology and PhD training program, seeing 7 PhD students and 2 Masters’ students to completion, 4 international postdoctoral fellows to completion (from India, Japan, Hong Kong and Australia), and currently supervising 3 PhD students.
  • Consolidating Australia’s premier animal translational electrophysiology lab marrying together multiple domains of cardiac mapping, advanced multi-modality imaging (cardiac CT. MRI, intracardiac echo), with basic science research and histopathology.
  • Won over $16 million of competitive research grant funding from National Heart and Medical Research Council, National Heart Foundation, Western Sydney Local Health, and American Heart Association.

Specific Research Interests

A/Prof Saurabh Kumar is internationally recognised not only for his clinical expertise, but also for his pioneering research in the field of cardiac electrophysiology. His work spans the full spectrum of translational research – from basic science and genetic discovery to advanced clinical trials and technological innovation – helping shape the future of arrhythmia care in Australia and worldwide.

Key Areas of Research Focus

1. Understanding the Mechanisms Behind Heart Rhythm Disorders

  • Investigating why arrhythmias occur at the cellular, tissue, and patient level
  • Bridging bench-to-bedside research – from laboratory and large animal studies to human clinical investigations
  • Exploring how abnormal electrical conduction leads to atrial fibrillation, ventricular tachycardia, and sudden cardiac death

2. Genetic Heart Disease and Inherited Arrhythmia Syndromes

  • Identifying new gene mutations and characterising novel genetic cardiomyopathies
  • Studying how genetic mutations in ion channels, desmosomes, and sarcomeres contribute to arrhythmias
  • Advancing personalised medicine for conditions like:
    • Lamin A/C cardiomyopathy
    • ARVC
    • Brugada syndrome
    • CPVT
    • Long QT syndrome (LQTS)

3. Optimising Treatment: Drugs vs Catheter Ablation

  • Designing and leading randomised controlled trials (RCTs) comparing:
    • Antiarrhythmic medications vs catheter ablation
    • First-line therapy strategies for VT, PVCs, and AF
  • Principal investigator in several international multi-centre trials

4. Innovation in Early Detection of Heart Disease

  • Evaluating emerging technologies in cardiac diagnostics, including:
    • Wearable ECG devices (e.g. smartwatches, patch monitors)
    • Strain imaging and advanced cardiac MRI techniques
    • AI-enhanced echocardiography

5. Artificial Intelligence in Electrophysiology

  • Applying machine learning and AI algorithms to:
    • Improve diagnosis of complex arrhythmias
    • Predict risk of sudden cardiac death
    • Guide personalised therapy
  • Developing AI models using large real-world datasets

6. Next-Generation Approaches to Catheter Ablation

  • Developing and refining novel ablation techniques, including:
    • Radiation therapy (SBRT) for refractory VT
    • Gene therapy for inherited arrhythmias and structural heart disease
    • Enhancing 3D mapping, energy delivery precision, and tissue response monitoring

Current Research Grants

  • REMOTE-CARE: REmote MOnitoring deTEcting CArdiac issues Rapidly to Enable care (2023), NHMRC, collaborating with Prof. Clara Chow, University of Sydney
  • Radiotherapy vs catheter ablation for ventricular tachycardia in advanced structural heart disease: a vanguard multi-centre, randomised controlled trial (RADIOABLATE-VT), National Heart Foundation (2022)
  • Reducing the impact of radiation on the heart for cancer and cardiac disease patients (NHMRC Synergy Grant with A/Prof Ricky O’Brien (RMIT) and others.
  • Gap Junction Modulation: A Novel Molecular Target in the Management of Ventricular Arrhythmia in Ischaemic Cardiomyopathy, NHMRC, 2022, with Prof. Eddy Kizana, University of Sydney.
  • The Elusive Hearts Study: Using genomics to diagnose and manage inherited cardiovascular diseases, NHMRC, 2022, with A/Prof. Jodie Ingles, Victor Chang
  • Next Generation Precision Health Platform to support Atrial Fibrillation Management, NHMRC, 2021, with A/Prof. Rajiv Mahan, University of Adelaide
  • FirstCPR: Improving health outcomes for people suffering out of hospital cardiac arrest, NHMRC, 2020, with Prof. Clara Chow, University of Sydney
  • Code STORM: STandard care Or a Rapid early invasive Management approach to patients with life-threatening heart rhythm disorders, NSW Health, 2022
  • The Inherited Cardiomyopathy Cohort Study, NHMRC, 2020, with A/Prof. Jodie Ingles, Victor Chang
  • CAAD-VT: Catheter Ablation versus AntiArrhythmic Drugs for the Treatment of Ventricular Tachycardia, 2019-currentm NSW Health

Prior Grants

  • Accuracy and Utility of Smartphone/Smartwatch based ECG Monitors for Diagnosis of Cardiac Arrhythmias, National Heart Foundation, 2019, results published in JACC, Heart Lung & Circulation
  • Randomised Controlled Trial of Smartphone based ECG Monitors vs. Conventional Ambulatory Monitors for the Detection of Cardiac Arrhythmias, 2019, results published in JACC
  • Code STORM: STandard care Or a Rapid early invasive Management approach to patients with life-threatening heart rhythm disorders, 2019, results published in Circulation: Arrhythmia & Electrophysiology
  • Effect of Intensive Blood Pressure Control on the Burden of Atrial Fibrillation in Patients with a Previously Recorded Episode of Atrial Fibrillation – a Feasibility Study, with Prof. Clara Chow
  • Role of Non-Invasive Imaging in the Identification and Treatment of Patients At-Risk of Life-Threatening Arrhythmias and Consequent Sudden Cardiac Arrest, NHMRC, results published in Circulation: Arrhythmia & Electrophysiology
  • Non-Invasive Detection of Arrhythmogenic Substrates that lead to Cardiac Arrest and Sudden Cardiac Death: Insights from Clinical and Experimental Studies

Specific Research Interests

A/Prof Saurabh Kumar is internationally recognised not only for his clinical expertise, but also for his pioneering research in the field of cardiac electrophysiology. His work spans the full spectrum of translational research – from basic science and genetic discovery to advanced clinical trials and technological innovation – helping shape the future of arrhythmia care in Australia and worldwide.

PUBLICATIONS – Refereed Journal Articles

  1. Chong JJ, Kumar S, Thomas L and Thomas S. Supraventricular ectopy and recurrence of atrial fibrillation after electrical cardioversion. Europace. 2006 May; 8(5):341-4. doi: 10.1093/europace/eul008
  2. Kumar S, Hsieh C, Sivagangabalan G, Chan H, Ryding AD, Narayan A, Ong AT, Sadick N and Kovoor P. Prognostic impact of Q waves on presentation and ST resolution in patients with ST-elevation myocardial infarction treated with primary percutaneous coronary intervention. Am J Cardiol. 2009 Sep 15; 104(6):780-5. doi: 10.1016/j.amjcard.2009.05.007
  3. Kumar S, Sivagangabalan G, Choi MC, Eipper V, Thiagalingam A and Kovoor P. Long-term outcomes of inducible very fast ventricular tachycardia (cycle length 200-250 ms) in patients with ischemic cardiomyopathy. J Cardiovasc Electrophysiol. 2010 Mar; 21(3):262-9. doi: 10.1111/j.15408167.2009.01624.x
  4. Kumar S, Sivagangabalan G, Hsieh C, Ryding AD, Narayan A, Chan H, Burgess DC, Ong AT, Sadick N and Kovoor P. Predictive value of ST resolution analysis performed immediately versus at ninety minutes after primary percutaneous coronary intervention. Am J Cardiol. 2010 Feb 15; 105(4):467-74. doi: 10.1016/j.amjcard.2009.10.017
  5. Kumar S, Sivagangabalan G, Zaman S, West EB, Narayan A, Thiagalingam A and Kovoor P. Electrophysiology-guided defibrillator implantation early after ST-elevation myocardial infarction. Heart Rhythm. 2010 Nov; 7(11):1589-97. doi: 10.1016/j.hrthm.2010.07.019
  6. Feldman A, Voskoboinik A, Kumar S, Spence S, Morton JB, Kistler PM, Sparks PB, Vohra JK and Kalman JM. Predictors of acute and long-term success of slow pathway ablation for atrioventricular nodal reentrant tachycardia: a single center series of 1,419 consecutive patients. Pacing Clin Electrophysiol. 2011 Aug; 34(8):927-33. doi: 10.1111/j.1540-8159.2011.03092.x
  7. Kumar S, Sivagangabalan G, Thiagalingam A, West EB, Narayan A, Sadick N, Ong AT and Kovoor P. Effect of reperfusion time on inducible ventricular tachycardia early and spontaneous ventricular arrhythmias late after ST elevation myocardial infarction treated with primary percutaneous coronary intervention. Heart Rhythm. 2011 Apr; 8(4):493-9. doi: 10.1016/j.hrthm.2010.11.046
  8. Kumar S, Sutherland F, Rosso R, Teh AW, Lee G, Heck PM, Feldman A, Medi C, Watt S, Garg ML and Sparks PB. Effects of chronic omega-3 polyunsaturated fatty acid supplementation on human atrial electrophysiology. Heart Rhythm. 2011 Apr; 8(4):562-8. doi: 10.1016/j.hrthm.2010.12.017 9) Kumar S, Sutherland F, Teh AW, Heck PM, Lee G, Garg ML and Sparks PB. Effects of chronic omega-3 polyunsaturated fatty acid supplementation on human pulmonary vein and left atrial electrophysiology in paroxysmal atrial fibrillation. Am J Cardiol. 2011 Aug 15; 108(4):531-5. doi: 10.1016/j.amjcard.2011.03.082
  9. Kumar S, Sutherland F, Wheeler M, Heck PM, Lee G, Teh AW, Garg ML, Morgan JG and Sparks PB. Effects of chronic omega-3 polyunsaturated fatty acid supplementation on human atrial mechanical function after reversion of atrial arrhythmias to sinus rhythm: reversal of tachycardia-mediated atrial cardiomyopathy with fish oils. Heart Rhythm. 2011 May; 8(5):643-9. doi: 10.1016/j.hrthm.2011.01.014
  10. Lee G, Roberts-Thomson K, Madry A, Spence S, Teh A, Heck PM, Kumar S, Kistler PM, Morton JB, Sanders P and Kalman JM. Relationship among complex signals, short cycle length activity, and dominant frequency in patients with long-lasting persistent AF: a high-density epicardial mapping study in humans. Heart Rhythm. 2011 Nov; 8(11):1714-9. doi: 10.1016/j.hrthm.2011.05.021
  11. Medi C, Sparks PB, Morton JB, Kistler PM, Halloran K, Rosso R, Vohra JK, Kumar S and Kalman JM. Pulmonary vein antral isolation for paroxysmal atrial fibrillation: results from long-term follow-up. J Cardiovasc Electrophysiol. 2011 Feb; 22(2):137-41. doi: 10.1111/j.1540-8167.2010.01885.x
  12. Mond HG, Feldman A, Kumar S, Rosso R, Hung TT and Pang B. Alternate site right ventricular pacing: defining template scoring. Pacing Clin Electrophysiol. 2011 Sep; 34(9):1080-6. doi: 10.1111/j.1540-8159.2011.03129.x
  13. Kumar S, Kalman JM, Sutherland F, Spence SJ, Finch S and Sparks PB. Atrial fibrillation inducibility in the absence of structural heart disease or clinical atrial fibrillation: critical dependence on induction protocol, inducibility definition, and number of inductions. Circ Arrhythm Electrophysiol. 2012 Jun 1; 5(3):531-6. doi: 10.1161/CIRCEP.111.968859
  14. Kumar S, Ling LH, Halloran K, Morton JB, Spence SJ, Joseph S, Kistler PM, Sparks PB and Kalman JM. Esophageal hematoma after atrial fibrillation ablation: incidence, clinical features, and sequelae of esophageal injury of a different sort. Circ Arrhythm Electrophysiol. 2012 Aug 1; 5(4):701-5. doi: 10.1161/CIRCEP.112.970624
  15. Kumar S, Morton JB, Halloran K, Spence SJ, Lee G, Wong MC, Kistler PM and Kalman JM. Effect of respiration on catheter-tissue contact force during ablation of atrial arrhythmias. Heart Rhythm. 2012 Jul; 9(7):1041-1047 e1. doi: 10.1016/j.hrthm.2012.02.015
  16. Kumar S, Morton JB, Lee J, Halloran K, Spence SJ, Gorelik A, Hepworth G, Kistler PM and Kalman JM. Prospective characterization of catheter-tissue contact force at different anatomic sites during antral pulmonary vein isolation. Circ Arrhythm Electrophysiol. 2012 Dec; 5(6):1124-9. doi: 10.1161/CIRCEP.112.972208
  17. Kumar S, Sutherland F, Morton JB, Lee G, Morgan J, Wong J, Eccleston DE, Voukelatos J, Garg ML and Sparks PB. Long-term omega-3 polyunsaturated fatty acid supplementation reduces the recurrence of persistent atrial fibrillation after electrical cardioversion. Heart Rhythm. 2012 Apr; 9(4):48391. doi: 10.1016/j.hrthm.2011.11.034
  18. Teh AW, Kalman JM, Lee G, Medi C, Heck PM, Ling LH, Kumar S, Spence SJ, Morton JB and Kistler PM. Electroanatomic remodelling of the pulmonary veins associated with age. Europace. 2012 Jan; 14(1):46-51. doi: 10.1093/europace/eur275
  19. Zaman S, Kumar S, Narayan A, Sivagangabalan G, Thiagalingam A, Ross DL, Thomas SP and Kovoor P. Induction of ventricular tachycardia with the fourth extrastimulus and its relationship to risk of arrhythmic events in patients with post-myocardial infarct left ventricular dysfunction. Europace. 2012 Dec; 14(12):1771-7. doi: 10.1093/europace/eus199
  20. Kumar S, Haqqani HM, Chan M, Lee J, Yudi M, Wong MC, Morton JB, Ling LH, Robinson T, Heck PM, Kelland NF, Halloran K, Spence SJ, Kistler PM and Kalman JM. Predictive value of impedance changes for real-time contact force measurements during catheter ablation of atrial arrhythmias in humans. Heart Rhythm. 2013 Jul; 10(7):962-9. doi: 10.1016/j.hrthm.2013.03.022
  21. Kumar S, Peters S, Thompson T, Morgan N, Maccicoca I, Trainer A, Zentner D, Kalman JM, Winship I and Vohra JK. Familial cardiological and targeted genetic evaluation: low yield in sudden unexplained death and high yield in unexplained cardiac arrest syndromes. Heart Rhythm. 2013 Nov; 10(11):1653-60. doi: 10.1016/j.hrthm.2013.08.022
  22. Kumar S, Sutherland F, Lee JM, Robinson T, Heck PM, Wong MC, Kelland NF, Garg ML and Sparks PB. Effects of high dose intravenous fish oil on human atrial electrophysiology: implications for possible anti- and proarrhythmic mechanisms in atrial fibrillation. Int J Cardiol. 2013 Oct 3; 168(3):2754-60. doi: 10.1016/j.ijcard.2013.03.053
  23. Kumar S, Sutherland F, Stevenson I, Lee JM, Garg ML and Sparks PB. Effects of long-term omega-3 polyunsaturated fatty acid supplementation on paroxysmal atrial tachyarrhythmia burden in patients with implanted pacemakers: results from a prospective randomised study. Int J Cardiol.
    1. Oct 9; 168(4):3812-7. doi: 10.1016/j.ijcard.2013.06.030
  24. Kumar S, Walters TE, Halloran K, Morton JB, Hepworth G, Wong CX, Kistler PM, Sanders P and Kalman JM. Ten-year trends in the use of catheter ablation for treatment of atrial fibrillation vs. the use of coronary intervention for the treatment of ischaemic heart disease in Australia. Europace. 2013 Dec; 15(12):1702-9. doi: 10.1093/europace/eut162
  25. Ling LH, Taylor AJ, Ellims AH, Iles LM, McLellan AJ, Lee G, Kumar S, Lee G, Teh A, Medi C, Kaye DM, Kalman JM and Kistler PM. Sinus rhythm restores ventricular function in patients with cardiomyopathy and no late gadolinium enhancement on cardiac magnetic resonance imaging who undergo catheter ablation for atrial fibrillation. Heart Rhythm. 2013 Sep; 10(9):1334-9. doi: 10.1016/j.hrthm.2013.06.019
  26. Wong MC, Edwards G, Spence SJ, Kalman JM, Kumar S, Joseph SA and Morton JB. Characterization of catheter-tissue contact force during epicardial radiofrequency ablation in an ovine model. Circ Arrhythm Electrophysiol. Dec; 6(6):1222-8. doi: 10.1161/CIRCEP.113.000184
  27. Wong MC, Kalman JM, Ling LH, Medi C, Teh A, Lee G, Kumar S, Morton JB and Kistler PM. Left septal atrial tachycardias: electrocardiographic and electrophysiologic characterization of a paraseptal focus. J Cardiovasc Electrophysiol. 2013 Apr; 24(4):413-8. doi: 10.1111/jce.12049
  28. Zaman S, Kumar S, Sullivan J, Narayan A, Thiagalingam A, Ross DL and Kovoor P. Significance of inducible very fast ventricular tachycardia (cycle length 200-230 ms) after early reperfusion for ST-segment-elevation myocardial infarction. Circ Arrhythm Electrophysiol. 2013 Oct; 6(5):884-90. doi: 10.1161/CIRCEP.113.000213
  29. Barbhaiya CR, Kumar S, Ng J, Tedrow U, Koplan B, John R, Epstein LM, Stevenson WG and Michaud GF. Overdrive pacing from downstream sites on multielectrode catheters to rapidly detect fusion and to diagnose macroreentrant atrial arrhythmias. Circulation. 2014 Jun 17; 129(24):250310. doi: 10.1161/CIRCULATIONAHA.113.008494
  30. Kumar S, Chan M, Lee J, Wong MC, Yudi M, Morton JB, Spence SJ, Halloran K, Kistler PM and Kalman JM. Catheter-tissue contact force determines atrial electrogram characteristics before and lesion efficacy after antral pulmonary vein isolation in humans. J Cardiovasc Electrophysiol. 2014 Feb; 25(2):122-9. doi: 10.1111/jce.12293
  31. Lee G, Kumar S, Teh A, Madry A, Spence S, Larobina M, Goldblatt J, Brown R, Atkinson V, Moten S, Morton JB, Sanders P, Kistler PM and Kalman JM. Epicardial wave mapping in human long-lasting persistent atrial fibrillation: transient rotational circuits, complex wavefronts, and disorganized activity. Eur Heart J. 2014 Jan; 35(2):86-97. doi: 10.1093/eurheartj/eht267
  32. Ling LH, McLellan AJ, Taylor AJ, Iles LM, Ellims AH, Kumar S, Teh A, Lee G,Wong MC, Azzopardi S, Sellenger MA, Morton JB, Kalman JM and Kistler
  33. Magnetic resonance post-contrast T1 mapping in the human atrium: validation and impact on clinical outcome after catheter ablation for atrial fibrillation. Heart Rhythm. 2014 Sep; 11(9):1551-9. doi: 10.1016/j.hrthm.2014.06.012
  34. Nagashima K, Choi EK, Lin KY, Kumar S, Tedrow UB, Koplan BA, Michaud GF, John RM, Epstein LM, Tokuda M, Inada K, Couper GS and Stevenson WG. Ventricular arrhythmias near the distal great cardiac vein: challenging arrhythmia for ablation. Circ Arrhythm Electrophysiol. 2014 Oct; 7(5):90612. doi: 10.1161/CIRCEP.114.001615
  35. Nagashima K, Choi EK, Tedrow UB, Koplan BA, Michaud GF, John RM, Epstein LM, Tokuda M, Inada K, Kumar S, Lin KY, Barbhaiya CR, Chinitz JS, Enriquez AD, Helmbold AF and Stevenson WG. Correlates and prognosis of early recurrence after catheter ablation for ventricular tachycardia due to structural heart disease. Circ Arrhythm Electrophysiol. 2014 Oct; 7(5):8838. doi: 10.1161/CIRCEP.114.001461
  36. Pang BJ, Kumar S, Tacey MA and Mond HG. Capturing the His-Purkinje system is not possible from conventional right ventricular apical and nonapical pacing sites. Pacing Clin Electrophysiol. 2014 Jun; 37(6):724-30. doi: 10.1111/pace.12331
  37. Baldinger SH, Kumar S, Barbhaiya CR, Mahida S, Epstein LM, Michaud GF, John R, Tedrow UB and Stevenson WG. Epicardial Radiofrequency Ablation Failure During Ablation Procedures for Ventricular Arrhythmias: Reasons and Implications for Outcomes. Circ Arrhythm Electrophysiol. 2015 Dec; 8(6):1422-32. doi: 10.1161/CIRCEP.115.003202
  38. Baldinger SH, Nagashima K, Kumar S, Barbhaiya CR, Choi EK, Epstein LM, Michaud GF, John R, Tedrow UB and Stevenson WG. Electrogram analysis and pacing are complimentary for recognition of abnormal conduction and farfield potentials during substrate mapping of infarct-related ventricular tachycardia. Circ Arrhythm Electrophysiol. 2015 Aug; 8(4):874-81. doi: 10.1161/CIRCEP.114.002714
  39. Barbhaiya CR, Kumar S, John RM, Tedrow UB, Koplan BA, Epstein LM, Stevenson WG and Michaud GF. Global survey of esophageal and gastric injury in atrial fibrillation ablation: incidence, time to presentation, and outcomes. J Am Coll Cardiol. 2015 Apr 7; 65(13):1377-1378. doi: 10.1016/j.jacc.2014.12.053
  40. Barbhaiya CR, Kumar S, Ng J, Nagashima K, Choi EK, Enriquez A, Chinitz J, Epstein LM, Tedrow UB, John RM, Stevenson WG and Michaud GF. Avoiding tachycardia alteration or termination during attempted entrainment mapping of atrial tachycardia related to atrial fibrillation ablation. Heart Rhythm. 2015 Jan; 12(1):32-5. doi: 10.1016/j.hrthm.2014.09.002
  41. Brosnan M, La Gerche A, Kumar S, Lo W, Kalman J and Prior D. Modest agreement in ECG interpretation limits the application of ECG screening in young athletes. Heart Rhythm. 2015 Jan; 12(1):130-6. doi: 10.1016/j.hrthm.2014.09.060
  42. Brosnan MJ, Kumar S, LaGerche A, Brown A, Stewart S, Kalman JM and Prior DL. Early repolarization patterns associated with increased arrhythmic risk are common in young non-Caucasian Australian males and not influenced by athletic status. Heart Rhythm. 2015 Jul; 12(7):1576-83. doi: 10.1016/j.hrthm.2015.03.060
  43. Choi EK, Kumar S, Nagashima K, Lin KY, Barbhaiya CR, Chinitz JS, Enriquez AD, Helmbold AF, Baldinger SH, Tedrow UB, Koplan BA, Michaud GF, John RM, Epstein LM and Stevenson WG. Better outcome of ablation for sustained outflow-tract ventricular tachycardia when tachycardia is inducible. Europace. 2015 Oct; 17(10):1571-9. doi: 10.1093/europace/euv064
  44. Choi EK, Nagashima K, Lin KY, Kumar S, Barbhaiya CR, Baldinger SH, Reichlin T, Michaud GF, Couper GS, Stevenson WG and John RM. Surgical cryoablation for ventricular tachyarrhythmia arising from the left ventricular outflow tract region. Heart Rhythm. 2015 Jun; 12(6):1128-36. doi: 10.1016/j.hrthm.2015.02.016
  45. Kumar S, Barbhaiya C, Nagashima K, Choi EK, Epstein LM, John RM, Maytin M, Albert CM, Miller AL, Koplan BA, Michaud GF, Tedrow UB and Stevenson WG. Ventricular tachycardia in cardiac sarcoidosis: characterization of ventricular substrate and outcomes of catheter ablation. Circ Arrhythm Electrophysiol. 2015 Feb; 8(1):87-93. doi: 10.1161/CIRCEP.114.002145
  46. Kumar S, Barbhaiya CR, Baldinger SH, Koplan BA, Maytin M, Epstein LM, John RM, Michaud GF, Tedrow UB and Stevenson WG. Epicardial phrenic nerve displacement during catheter ablation of atrial and ventricular arrhythmias: procedural experience and outcomes. Circ Arrhythm Electrophysiol. 2015 Aug; 8(4):896-904. doi: 10.1161/CIRCEP.115.002818
  47. Kumar S, Barbhaiya CR, Sobieszczyk P, Eisenhauer AC, Couper GS, Nagashima K, Mahida S, Baldinger SH, Choi EK, Epstein LM, Koplan BA, John RM, Michaud GF, Stevenson WG and Tedrow UB. Role of alternative interventional procedures when endo- and epicardial catheter ablation attempts for ventricular arrhythmias fail. Circ Arrhythm Electrophysiol. 2015 Jun; 8(3):606-15. doi: 10.1161/CIRCEP.114.002522
  48. Kumar S, Bazaz R, Barbhaiya CR, Enriquez AD, Helmbold AF, Chinitz JS, Baldinger SH, Mahida S, McConville JW, Tedrow UB, John RM, Michaud GF and Stevenson WG. “Needle-in-needle” epicardial access: Preliminary observations with a modified technique for facilitating epicardial interventional procedures. Heart Rhythm. 2015 Jul; 12(7):1691-7. doi: 10.1016/j.hrthm.2015.03.045
  49. Kumar S, Brown G, Sutherland F, Morgan J, Andrews D, Ling LH, Mc LA, Lee G, Robinson T, Heck P, Halloran K, Morton J, Kistler P, Kalman JM and Sparks PB. The transesophageal echo probe may contribute to esophageal injury after catheter ablation for paroxysmal atrial fibrillation under general anesthesia: a preliminary observation. J Cardiovasc Electrophysiol. 2015 Feb; 26(2):119-26. doi: 10.1111/jce.12575
  50. Kumar S, Morton JB, Lee G, Halloran K, Kistler PM and Kalman JM. High Incidence of Low Catheter-Tissue Contact Force at the Cavotricuspid Isthmus During Catheter Ablation of Atrial Flutter: Implications for Achieving Isthmus Block. J Cardiovasc Electrophysiol. 2015 Aug; 26(8):826-831. doi: 10.1111/jce.12707
  51. McLellan AJ, Ling LH, Azzopardi S, Lee GA, Lee G, Kumar S, Wong MC, Walters TE, Lee JM, Looi KL, Halloran K, Stiles MK, Lever NA, Fynn SP, Heck PM, Sanders P, Morton JB, Kalman JM and Kistler PM. A minimal or maximal ablation strategy to achieve pulmonary vein isolation for paroxysmal atrial fibrillation: a prospective multi-centre randomized controlled trial (the Minimax study). Eur Heart J. 2015 Jul 21; 36(28):1812-21. doi: 10.1093/eurheartj/ehv139
  52. Nagashima K, Kumar S, Stevenson WG, Epstein LM, John RM, Tedrow UB, Koplan BA and Michaud GF. Anterograde conduction to the His bundle during right ventricular overdrive pacing distinguishes septal pathway atrioventricular reentry from atypical atrioventricular nodal reentrant tachycardia. Heart Rhythm. 2015 Apr; 12(4):735-43. doi: 10.1016/j.hrthm.2015.01.003
  53. Baldinger SH, Chinitz JS, Kapur S, Kumar S, Barbhaiya CR, Fujii A, Romero J, Epstein LM, John R, Tedrow UB, Stevenson WG and Michaud GF. Recurrence of Atrial Arrhythmias Despite Persistent Pulmonary Vein Isolation After Catheter Ablation for Atrial Fibrillation: A Case Series. JACC Clin Electrophysiol. 2016 Nov; 2(6):723-731. doi: 10.1016/j.jacep.2016.05.013
  54. Baldinger SH, Kumar S, Barbhaiya CR, Nagashima K, Epstein LM, John R, Tedrow UB, Stevenson WG and Michaud GF. The Timing and Frequency of Pulmonary Veins Unexcitability Relative to Completion of a Wide Area Circumferential Ablation Line for Pulmonary Vein Isolation. JACC Clin Electrophysiol. 2016 Feb; 2(1):14-23. doi: 10.1016/j.jacep.2015.09.010
  55. Barbhaiya CR, Kumar S, Baldinger SH, Michaud GF, Stevenson WG, Falk R and John RM. Electrophysiologic assessment of conduction abnormalities and atrial arrhythmias associated with amyloid cardiomyopathy. Heart Rhythm. 2016 Feb; 13(2):383-90. doi: 10.1016/j.hrthm.2015.09.016
  56. Barbhaiya CR, Kumar S, Guo Y, Zhong J, John RM, Tedrow UB, Koplan BA, Epstein LM, Stevenson WG and Michaud GF. Global Survey of Esophageal Injury in Atrial Fibrillation Ablation: Characteristics and Outcomes of Esophageal Perforation and Fistula. JACC Clin Electrophysiol. 2016 Apr; 2(2):143-150. doi: 10.1016/j.jacep.2015.10.013
  57. Chinitz JS, Kapur S, Barbhaiya C, Kumar S, John R, Epstein LM, Tedrow U, Stevenson WG and Michaud GF. Sites With Small Impedance Decrease During Catheter Ablation for Atrial Fibrillation Are Associated With Recovery of Pulmonary Vein Conduction. J Cardiovasc Electrophysiol. 2016 Dec; 27(12):1390-1398. doi: 10.1111/jce.13095
  58. Kumar S, Androulakis AF, Sellal JM, Maury P, Gandjbakhch E, Waintraub X, Rollin A, Richard P, Charron P, Baldinger SH, Macintyre CJ, Koplan BA, John RM, Michaud GF, Zeppenfeld K, Sacher F, Lakdawala NK, Stevenson WG and Tedrow UB. Multicenter Experience With Catheter Ablation for Ventricular Tachycardia in Lamin A/C Cardiomyopathy. Circ Arrhythm Electrophysiol. 2016 Aug; 9(8). doi: 10.1161/CIRCEP.116.004357
  59. Kumar S, Baldinger SH, Gandjbakhch E, Maury P, Sellal JM, Androulakis AF, Waintraub X, Charron P, Rollin A, Richard P, Stevenson WG, Macintyre CJ, Ho CY, Thompson T, Vohra JK, Kalman JM, Zeppenfeld K, Sacher F, Tedrow UB and Lakdawala NK. Long-Term Arrhythmic and Nonarrhythmic Outcomes of Lamin A/C Mutation Carriers. J Am Coll Cardiol. 2016 Nov 29; 68(21):2299-2307. doi: 10.1016/j.jacc.2016.08.058
  60. Kumar S, Baldinger SH, Romero J, Fujii A, Mahida SN, Tedrow UB and Stevenson WG. Substrate-Based Ablation Versus Ablation Guided by Activation and Entrainment Mapping for Ventricular Tachycardia: A Systematic Review and Meta-Analysis. J Cardiovasc Electrophysiol. 2016 Dec; 27(12):1437-1447. doi: 10.1111/jce.13088
  61. Kumar S, Romero J, Mehta NK, Fujii A, Kapur S, Baldinger SH, Barbhaiya CR, Koplan BA, John RM, Epstein LM, Michaud GF, Tedrow UB and Stevenson WG. Long-term outcomes after catheter ablation of ventricular tachycardia in patients with and without structural heart disease. Heart Rhythm. 2016 Oct; 13(10):1957-63. doi: 10.1016/j.hrthm.2016.07.001
  62. Baldinger SH, Kumar S, Romero J, Fujii A, Epstein LM, Michaud GF, John R, Tedrow UB and Stevenson WG. A Comparison of Women and Men Undergoing Catheter Ablation for Sustained Monomorphic Ventricular Tachycardia. J Cardiovasc Electrophysiol. 2017 Feb; 28(2):201-207. doi: 10.1111/jce.13127
  63. Enriquez AD, Churchill T, Gautam S, Chinitz JS, Barbhaiya CR, Kumar S, John RM, Tedrow UB, Koplan BA, Stevenson WG and Michaud GF. Determinants of Heparin Dosing and Complications in Patients Undergoing Left Atrial Ablation on Uninterrupted Rivaroxaban. Pacing Clin Electrophysiol. 2017 Feb; 40(2):183-190. doi: 10.1111/pace.13013
  64. Fujii A, Nagashima K, Kumar S, Tanigawa S, Baldinger SH, Michaud GF, John RM, Koplan BA, Tokuda M, Inada K, Tedrow UB and Stevenson WG. Significance of Inducible Nonsustained Ventricular Tachycardias After Catheter Ablation for Ventricular Tachycardia in Ischemic Cardiomyopathy. Circ Arrhythm Electrophysiol. 2017 Dec; 10(12). doi: 10.1161/CIRCEP.117.005005
  65. Kumar S, Fujii A, Kapur S, Romero J, Mehta NK, Tanigawa S, Epstein LM, Koplan BA, Michaud GF, John RM, Stevenson WG and Tedrow UB. Beyond the Storm: Comparison of Clinical Factors, Arrhythmogenic Substrate, and Catheter Ablation Outcomes in Structural Heart Disease Patients With versus Those Without a History of Ventricular Tachycardia Storm. J Cardiovasc Electrophysiol. 2017 Jan; 28(1):56-67. doi: 10.1111/jce.13117
  66. Kumar S, Romero J, Stevenson WG, Foley L, Caulfield R, Fujii A, Tanigawa S, Epstein LM, Koplan BA, Tedrow UB, John RM and Michaud GF. Impact of Lowering Irrigation Flow Rate on Atrial Lesion Formation in Thin Atrial Tissue: Preliminary Observations From Experimental and Clinical Studies. JACC Clin Electrophysiol. 2017 Oct; 3(10):1114-1125. doi: 10.1016/j.jacep.2017.09.001
  67. McLellan AJA, Kumar S, Smith C, Ling LH, Prabhu S, Kalman JM and Kistler PM. The role of adenosine challenge in catheter ablation for atrial fibrillation: A systematic review and meta-analysis. Int J Cardiol. 2017 Jun 1; 236:253-doi: 10.1016/j.ijcard.2017.01.070
  68. Romero J, Diaz JC, Di Biase L, Kumar S, Briceno D, Tedrow UB, Valencia CR, Baldinger SH, Koplan B, Epstein LM, John R, Michaud GF and Stevenson WG. Atrial fibrillation inducibility during cavotricuspid isthmusdependent atrial flutter ablation as a predictor of clinical atrial fibrillation. A meta-analysis. J Interv Card Electrophysiol. 2017 Apr; 48(3):307-315. doi: 10.1007/s10840-016-0211-9
  69. Romero J, Kumar S, Akira F, Briceno DF, Tedrow UB, Epstein L, John R, Stevenson WG and Michaud GF. Emergence of atrioventricular nodal reentry tachycardia after surgical or catheter ablation for atrial fibrillation: Are we creating the arrhythmia substrate? Heart Rhythm. 2017 Nov; 14(11):1637-doi: 10.1016/j.hrthm.2017.08.002
  70. Samanta R, Kumar S, Chik W, Qian P, Barry MA, Al Raisi S, Bhaskaran A, Farraha M, Nadri F, Kizana E, Thiagalingam A, Kovoor P and Pouliopoulos J. Influence of Intramyocardial Adipose Tissue on the Accuracy of Endocardial Contact Mapping of the Chronic Myocardial Infarction Substrate. Circ Arrhythm Electrophysiol. 2017 Oct; 10(10). doi: 10.1161/CIRCEP.116.004998
  71. Santangeli P, Frankel DS, Tung R, Vaseghi M, Sauer WH, Tzou WS, Mathuria N, Nakahara S, Dickfeldt TM, Lakkireddy D, Bunch TJ, Di Biase L, Natale A, Tholakanahalli V, Tedrow UB, Kumar S, Stevenson WG, Della Bella P, Shivkumar K, Marchlinski FE, Callans DJ and International VTACCG. Early Mortality After Catheter Ablation of Ventricular Tachycardia in Patients With Structural Heart Disease. J Am Coll Cardiol. 2017 May 2; 69(17):2105-doi: 10.1016/j.jacc.2017.02.044
  72. Barbhaiya CR, Baldinger SH, Kumar S, Chinitz JS, Enriquez AD, John R, Stevenson WG and Michaud GF. Downstream overdrive pacing and intracardiac concealed fusion to guide rapid identification of atrial tachycardia after atrial fibrillation ablation. Europace. 2018 Apr 1; 20(4):596-603. doi: 10.1093/europace/euw405
  73. Kapur S, Kumar S, John RM, Stevenson WG, Tedrow UB, Koplan BA, Epstein LM, MacRae CA and Michaud GF. Family history of atrial fibrillation as a predictor of atrial substrate and arrhythmia recurrence in patients undergoing atrial fibrillation catheter ablation. Europace. 2018 Jun 1; 20(6):921-928. doi: 10.1093/europace/eux107
  74. Kumar S, Baldinger SH, Kapur S, Romero J, Mehta NK, Mahida S, Fujii A, Tedrow UB and Stevenson WG. Right ventricular scar-related ventricular tachycardia in nonischemic cardiomyopathy: Electrophysiological characteristics, mapping, and ablation of underlying heart disease. J Cardiovasc Electrophysiol. 2018 Jan; 29(1):79-89. doi: 10.1111/jce.13346
  75. Qian P, De Silva K, Kumar S, Nadri F, Samanta R, Bhaskaran A, Ross D, Sivagangabalan G, Cooper M, Kizana E, Davis L, Denniss AR, Thiagalingam A, Thomas S and Kovoor P. Early and long-term outcomes after manual and remote magnetic navigation-guided catheter ablation for ventricular tachycardia. Europace. 2018 May 1; 20(suppl_2):ii11-ii21. doi: 10.1093/europace/euy057
  76. Romero J, Cerrud-Rodriguez RC, Diaz JC, Michaud GF, Taveras J, Alviz I, Grupposo V, Cerna L, Avendano R, Kumar S, Kirchhof P, Natale A and Di Biase L. Uninterrupted direct oral anticoagulants vs. uninterrupted vitamin K antagonists during catheter ablation of non-valvular atrial fibrillation: a systematic review and meta-analysis of randomized controlled trials. Europace. 2018 Oct 1; 20(10):1612-1620. doi: 10.1093/europace/euy133
  77. Romero J, Di Biase L, Diaz JC, Quispe R, Du X, Briceno D, Avendano R, Tedrow U, John RM, Michaud GF, Natale A, Stevenson WG and Kumar S. Early Versus Late Referral for Catheter Ablation of Ventricular Tachycardia in Patients With Structural Heart Disease: A Systematic Review and Meta-Analysis of Clinical Outcomes. JACC Clin Electrophysiol. 2018 Mar; 4(3):374-382. doi: 10.1016/j.jacep.2017.12.008
  78. Romero J, Michaud GF, Avendano R, Briceno DF, Kumar S, Carlos Diaz J, Mohanty S, Trivedi C, Gianni C, Della Rocca D, Proietti R, Perrotta L, Bordignon S, Chun JKR, Schmidt B, Garcia M, Natale A and Di Biase L. Benefit of left atrial appendage electrical isolation for persistent and longstanding persistent atrial fibrillation: a systematic review and meta-analysis. Europace. 2018 Aug 1; 20(8):1268-1278. doi: 10.1093/europace/eux372
  79. Romero J, Stevenson WG, Fujii A, Kapur S, Baldinger SH, Mehta NK, John RM, Michaud GF, Epstein LM, Koplan BA, Tedrow UB and Kumar S. Impact of Number of Oral Antiarrhythmic Drug Failures Before Referral on Outcomes Following Catheter Ablation of Ventricular Tachycardia. JACC Clin Electrophysiol. 2018 Jun; 4(6):810-819. doi: 10.1016/j.jacep.2018.01.016
  80. Samanta R, Pouliopoulos J, Kumar S, Narayan A, Nadri F, Qian P, Thomas S, Sivagangabalan G, Kovoor P and Thiagalingam A. Influence of BMI on inducible ventricular tachycardia and mortality in patients with myocardial infarction and left ventricular dysfunction: The obesity paradox. Int J Cardiol. 2018 Aug 15; 265:148-154. doi: 10.1016/j.ijcard.2018.03.055
  81. Anderson RD, Ariyarathna N, Lee G, Virk S, Trivic I, Campbell T, Chow CK, Kalman J and Kumar S. Catheter ablation versus medical therapy for treatment of ventricular tachycardia associated with structural heart disease: Systematic review and meta-analysis of randomized controlled trials and comparison with observational studies. Heart Rhythm. 2019 Oct; 16(10):1484-1491. doi: 10.1016/j.hrthm.2019.05.026
  82. Anderson RD, Lee G, Prabhu M, Patrick CJ, Trivic I, Campbell T, Chow CK, Kalman JM and Kumar S. Ten-year trends in catheter ablation for ventricular tachycardia vs other interventional procedures in Australia. J Cardiovasc Electrophysiol. 2019 Nov; 30(11):2353-2361. doi: 10.1111/jce.14143
  83. Baldinger SH, Kumar S, Fujii A, Haeberlin A, Romero J, Epstein LM, Michaud GF, Tedrow UB, John R and Stevenson WG. Substrate mapping for scarrelated ventricular tachycardia in patients with resynchronization therapy-the importance of the pacing mode. J Interv Card Electrophysiol. 2019 Jun; 55(1):55-62. doi: 10.1007/s10840-019-00548-5
  84. Mahida S, Venlet J, Saguner AM, Kumar S, Baldinger SH, AbdelWahab A, Tedrow UB, Castelletti S, Pantazis A, John RM, McKenna WJ, Lambiase PD, Duru F, Sapp JL, Zeppenfeld K and Stevenson WG. Ablation compared with drug therapy for recurrent ventricular tachycardia in arrhythmogenic right ventricular cardiomyopathy: Results from a multicenter study. Heart Rhythm. 2019 Apr; 16(4):536-543. doi: 10.1016/j.hrthm.2018.10.016
  85. Parikh VN, Caleshu C, Reuter C, Lazzeroni LC, Ingles J, Garcia J, McCaleb K, Adesiyun T, Sedaghat-Hamedani F, Kumar S, Graw S, Gigli M, Stolfo D, Dal Ferro M, Ing AY, Nussbaum R, Funke B, Wheeler MT, Hershberger RE, Cook S, Steinmetz LM, Lakdawala NK, Taylor MRG, Mestroni L, Merlo M, Sinagra G, Semsarian C, Meder B, Judge DP and Ashley E. Regional Variation in RBM20 Causes a Highly Penetrant Arrhythmogenic Cardiomyopathy. Circ Heart Fail. 2019 Mar; 12(3):e005371. doi: 10.1161/CIRCHEARTFAILURE.118.005371
  86. Romero J, Cerrud-Rodriguez RC, Di Biase L, Diaz JC, Alviz I, Grupposo V, Cerna L, Avendano R, Tedrow U, Natale A, Tung R and Kumar S. Combined Endocardial-Epicardial Versus Endocardial Catheter Ablation Alone for Ventricular Tachycardia in Structural Heart Disease: A Systematic Review and Meta-Analysis. JACC Clin Electrophysiol. 2019 Jan; 5(1):13-24. doi: 10.1016/j.jacep.2018.08.010
  87. Virk SA, Ariyaratnam J, Bennett RG and Kumar S. Updated systematic review and meta-analysis of the impact of contact force sensing on the safety and efficacy of atrial fibrillation ablation: discrepancy between observational studies and randomized control trial data. Europace. 2019 Feb 1; 21(2):239-doi: 10.1093/europace/euy266
  88. Virk SA, Bennett RG, Chow C, Sanders P, Kalman JM, Thomas S and Kumar S. Catheter Ablation Versus Medical Therapy for Atrial Fibrillation in Patients With Heart Failure: A Meta-Analysis of Randomised Controlled Trials. Heart Lung Circ. 2019 May; 28(5):707-718. doi: 10.1016/j.hlc.2018.10.022 Virk SA and Kumar S. Remote Magnetic Versus Manual Catheter Navigation for Atrial Fibrillation Ablation: A Meta-Analysis. Circ Arrhythm Electrophysiol. 2019 Oct; 12(10):e007517. doi: 10.1161/CIRCEP.119.007517
  89. Wahbi K, Ben Yaou R, Gandjbakhch E, Anselme F, Gossios T, Lakdawala NK, Stalens C, Sacher F, Babuty D, Trochu JN, Moubarak G, Savvatis K, Porcher R, Laforet P, Fayssoil A, Marijon E, Stojkovic T, Behin A, LeonardLouis S, Sole G, Labombarda F, Richard P, Metay C, Quijano-Roy S, Dabaj I, Klug D, Vantyghem MC, Chevalier P, Ambrosi P, Salort E, Sadoul N, Waintraub X, Chikhaoui K, Mabo P, Combes N, Maury P, Sellal JM, Tedrow UB, Kalman JM, Vohra J, Androulakis AFA, Zeppenfeld K, Thompson T, Barnerias C, Becane HM, Bieth E, Boccara F, Bonnet D, Bouhour F, Boule S, Brehin AC, Chapon F, Cintas P, Cuisset JM, Davy JM, De Sandre-Giovannoli A, Demurger F, Desguerre I, Dieterich K, Durigneux J, Echaniz-Laguna A, Eschalier R, Ferreiro A, Ferrer X, Francannet C, Fradin M, Gaborit B, Gay A, Hagege A, Isapof A, Jeru I, Juntas Morales R, Lagrue E, Lamblin N, Lascols O, Laugel V, Lazarus A, Leturcq F, Levy N, Magot A, Manel V, Martins R, Mayer M, Mercier S, Meune C, Michaud M, Minot-Myhie MC, Muchir A, Nadaj-Pakleza A, Pereon Y, Petiot P, Petit F, Praline J, Rollin A, Sabouraud P, Sarret C, Schaeffer S, Taithe F, Tard C, Tiffreau V, Toutain A, Vatier C, Walther-Louvier U, Eymard B, Charron P, Vigouroux C, Bonne G, Kumar S, Elliott P and Duboc D. Development and Validation of a New Risk Prediction Score for Life-Threatening Ventricular Tachyarrhythmias in Laminopathies. Circulation. 2019 Jul 23; 140(4):293-302. doi: 10.1161/CIRCULATIONAHA.118.039410
  90. Anderson RD, Kumar S, Binny S, Prabhu M, Al-Kaisey A, Parameswaran R, Sugumar H, Chieng D, Hawson J, Campbell T, Joshi S, Lui E, Sparks PB, Joseph SA, Morton JB, McLellan A, Lipton J, Pathik B, Kistler PM, Kalman J and Lee G. Modified Precordial Lead R-Wave Deflection Interval Predicts Left- and Right-Sided Idiopathic Outflow Tract Ventricular Arrhythmias. JACC Clin Electrophysiol. 2020 Oct 26; 6(11):1405-1419. doi: x10.1016/j.jacep.2020.07.011
  91. Anderson RD, Lee G, Campbell T, Bennett RG, Kizana E, Watts T, Kalman J and Kumar S. Scar nonexcitability using simultaneous pacing for substrate ablation of ventricular tachycardia. Pacing Clin Electrophysiol. 2020 Nov; 43(11):1219-1234. doi: 10.1111/pace.14025
  92. Anderson RD, Lee G, Trivic I, Campbell T, Pham T, Nalliah C, Kizana E, Thomas SP, Trivedi SJ, Watts T, Kalman J and Kumar S. Focal Ventricular Tachycardias in Structural Heart Disease: Prevalence, Characteristics, and Clinical Outcomes After Catheter Ablation. JACC Clin Electrophysiol. 2020 Jan; 6(1):56-69. doi: 10.1016/j.jacep.2019.09.013
  93. Campbell T, Bennett RG, Garikapati K, Turnbull S, Bhaskaran A, De Silva K and Kumar S. Prognostic significance of extensive versus limited induction protocol during catheter ablation of scar-related ventricular tachycardia. J Cardiovasc Electrophysiol. 2020 Nov; 31(11):2909-2919. doi: 10.1111/jce.14740
  94. Campbell T, Trivic I, Bennett RG, Anderson RD, Turnbull S, Pham T, Nalliah C, Kizana E, Watts T, Lee G and Kumar S. Catheter ablation of ventricular arrhythmia guided by a high-density grid catheter. J Cardiovasc Electrophysiol. 2020 Feb; 31(2):474-484. doi: 10.1111/jce.14351
  95. De Silva K, Virk S, Nalliah CJ, Campbell T and Kumar S. Multielectrode Mapping Versus Point-by-Point Mapping for Catheter Ablation of Ventricular Tachycardia: A Systematic Review and Meta-Analysis. JACC Clin Electrophysiol. 2020 Jul; 6(7):876-878. doi: 10.1016/j.jacep.2020.04.007 97) Farraha M, Lu J, Trivic I, Barry MA, Chong J, Kumar S and Kizana E. Development of a sheep model of atrioventricular block for the application of novel therapies. PLoS One. 2020 15(2):e0229092. doi: 10.1371/journal.pone.0229092
  96. Hoogendoorn JC, Sramko M, Venlet J, Siontis KC, Kumar S, Singh R, Nakajima I, Piers SRD, de Riva Silva M, Glashan CA, Crawford T, Tedrow UB, Stevenson WG, Bogun F and Zeppenfeld K. Electroanatomical Voltage Mapping to Distinguish Right-Sided Cardiac Sarcoidosis From Arrhythmogenic Right Ventricular Cardiomyopathy. JACC Clin Electrophysiol. 2020 Jun; 6(6):696-707. doi: 10.1016/j.jacep.2020.02.008
  97. Kumar S, Haqqani H, Wynn G, Pathak RK, Lipton J, Mahajan R, Sanders P, Healey S, Wilsmore B, Mariani JA, Thomas SP, Weerasooriya R, McGavigan A, Gould PA, Weatherley P, Saad N, Cowan M, Turnbull S, Trivic I, Wong M, Tonchev I, Morton JB, Skinner JR, Pflaumer A, McGuire M, Kistler P, Kalman JM, Cardiac Society of A and New Zealand Heart Rhythm Council C-PWG. Position Statement on the Management of Cardiac Electrophysiology and Cardiac Implantable Electronic Devices in Australia During the COVID-19 Pandemic: A Living Document. Heart Lung Circ. 2020 Jun; 29(6):e57-e68. doi: 10.1016/j.hlc.2020.04.001
  98. Trivedi SJ, Campbell T, Stefani L, Kumar S and Thomas L. Speckle-Tracking Strain Echocardiography in the Assessment of Myocardial Mechanics in Patients With Idiopathic Ventricular Arrhythmias: A Longitudinal Follow-Up Study. Circ Arrhythm Electrophysiol. 2020 Sep; 13(9):e008748. doi: 10.1161/CIRCEP.120.008748
  99. Zaman S, MacIsaac AI, Jennings GL, Schlaich MP, Inglis SC, Arnold R, Kumar S, Thomas L, Wahi S, Lo S, Naismith C, Duffy SJ, Nicholls SJ, Newcomb A, Almeida AA, Wong S, Lund M, Chew DP, Kritharides L, Chow CK and Bhindi R. Cardiovascular disease and COVID-19: Australian and New Zealand consensus statement. Med J Aust. 2020 Aug; 213(4):182-187. doi: 10.5694/mja2.50714
  100. Bennett R, Campbell T, Byth K, Turnbull S and Kumar S. Catheter Ablation Using Half-Normal Saline and Dextrose Irrigation in an Ovine Ventricular Model. JACC Clin Electrophysiol. 2021 Oct; 7(10):1229-1239. doi: 10.1016/j.jacep.2021.05.002
  101. Bennett R, Campbell T, De Silva K, Bhaskaran A and Kumar S. Catheter Ablation of Ventricular Tachycardia Guided by Substrate Electrical Inexcitability. Circ Arrhythm Electrophysiol. 2021 Mar; 14(3):e009408. doi: 10.1161/CIRCEP.120.009408
  102. Bennett R, Campbell T, Kotake Y, Turnbull S, Bhaskaran A, De Silva K, Lee G, Kalman J and Kumar S. Catheter ablation of idiopathic outflow tract ventricular arrhythmias with low intraprocedural burden guided by pace mapping. Heart Rhythm O2. 2021 Aug; 2(4):355-364. doi: 10.1016/j.hroo.2021.05.008
  103. Bennett R, Campbell T, Turnbull S and Kumar S. Ablation Index Correlation With Lesion Size in the Catheter Ablation of a Beating Ovine Ventricular Model. Circ Arrhythm Electrophysiol. 2021 Oct; 14(10):e010295. doi: 10.1161/CIRCEP.121.010295
  104. Bennett R, Turnbull S, Kotake Y, Campbell T and Kumar S. Ventricular Arrhythmia Burden as a Marker of Success Following Catheter Ablation of Ventricular Arrhythmias in Patients with Structural Heart Disease. Korean Circ J. 2021 May; 51(5):455-468. doi: 10.4070/kcj.2020.0415
  105. Bennett RG, Campbell T, Sood A, Bhaskaran A, De Silva K, Davis L, Qian P, Sivagangabalan G, Cooper MJ, Chow CK, Thiagalingam A, Denniss AR, Thomas SP, Kizana E and Kumar S. Remote magnetic navigation compared to contemporary manual techniques for the catheter ablation of ventricular arrhythmias in structural heart disease. Heliyon. 2021 Dec; 7(12):e08538. doi: 10.1016/j.heliyon.2021.e08538
  106. Campbell T, Bennett RG, Lee V, Turnbull S, Eslick A, Kruit N, Pudipeddi A, Hing A, Kizana E, Thomas SP and Kumar S. Ventricular Tachycardia Storm Ablation With Pre-Emptive Circulatory Support by Extracorporeal Membrane Oxygenation: Australian Experience. Heart Lung Circ. 2021 Apr; 30(4):555-doi: 10.1016/j.hlc.2020.09.926
  107. Gandjbakhch E, Laredo M, Berruezo A, Gourraud JB, Sellal JM, Martins R, Sacher F, Pison L, Pruvot E, Jauregui B, Frontera A, Kumar S, Wong T, DellaBella P and Maury P. Outcomes after catheter ablation of ventricular tachycardia without implantable cardioverter-defibrillator in selected patients with arrhythmogenic right ventricular cardiomyopathy. Europace. 2021 Sep 8; 23(9):1428-1436. doi: 10.1093/europace/euab172
  108. Hawson J, Harmer JA, Cowan M, Virk S, Campbell T, Bennett RG, Anderson RD, Kalman J, Lee G and Kumar S. Renal Denervation for the Management of Refractory Ventricular Arrhythmias: A Systematic Review. JACC Clin Electrophysiol. 2021 Jan; 7(1):100-108. doi: 10.1016/j.jacep.2020.07.019
  109. Hoogendoorn JC, Venlet J, Out YNJ, Man S, Kumar S, Sramko M, Dechering DG, Nakajima I, Siontis KC, Watanabe M, Nakamura Y, Tedrow UB, Bogun F, Eckardt L, Peichl P, Stevenson WG and Zeppenfeld K. The precordial R’ wave: A novel discriminator between cardiac sarcoidosis and arrhythmogenic right ventricular cardiomyopathy in patients presenting with ventricular tachycardia. Heart Rhythm. 2021 Sep; 18(9):1539-1547. doi: 10.1016/j.hrthm.2021.04.032
  110. Klimis H, Von Huben A, Turnbull S, Han J, Chen H, Nalliah CJ, Thiagalingam A, Chow CK and Kumar S. Rapid Access Arrhythmia Clinics (RAACs) Versus Usual Care: Improving Efficiency and Safety of Arrhythmia Management. Heart Lung Circ. 2021 May; 30(5):665-673. doi: 10.1016/j.hlc.2020.10.023
  111. Kotake Y, Campbell T, Bennett RG, Turnbull S, Huang K, Ross N, Trivic I, De Silva K, Bhaskaran A and Kumar S. Clinical and Electrophysiological Characteristics of Ventricular Tachycardias From the Basal Septum in Structural Heart Disease. JACC Clin Electrophysiol. 2021 Oct; 7(10):1274-doi: 10.1016/j.jacep.2021.06.001
  112. Tonchev IR, Nam MCY, Gorelik A, Kumar S, Haqqani H, Sanders P, Kistler PM and Kalman JM. Relationship between procedural volume and complication rates for catheter ablation of atrial fibrillation: a systematic review and meta-analysis. Europace. 2021 Jul 18; 23(7):1024-1032. doi: 10.1093/europace/euaa415
  113. Trivedi SJ, Campbell T, Stefani LD, Thomas L and Kumar S. Strain by speckle tracking echocardiography correlates with electroanatomic scar location and burden in ischaemic cardiomyopathy. Eur Heart J Cardiovasc Imaging. 2021 Jul 20; 22(8):855-865. doi: 10.1093/ehjci/jeab021
  114. Wong KC, Thiagalingam A, Kumar S, Marschner S, Kunwar R, Bailey J, Kok C, Usherwood T and Chow CK. User Perceptions and Experiences of a Handheld 12-Lead Electrocardiographic Device in a Clinical Setting: Usability Evaluation. JMIR Cardio. 2021 Aug 26; 5(2):e21186. doi: 10.2196/21186
  115. Bennett RG, Campbell T, Kotake Y, Turnbull S and Kumar S. Clinical, Electroanatomic and Electrophysiologic Characterization, and Outcomes of Catheter Ablation for Ventricular Tachycardia in Patients With a Mixed Cardiomyopathy. Circ Arrhythm Electrophysiol. 2022 Feb; 15(2):e010476. doi: 10.1161/CIRCEP.121.010476
  116. Bennett RG, Campbell T, Kotake Y, Turnbull S and Kumar S. Catheter ablation of ventricular tachycardia in nonischemic cardiomyopathy with nearnormal left ventricular ejection fraction. Heart Rhythm. 2022 Jan; 19(1):5160. doi: 10.1016/j.hrthm.2021.09.026
  117. Bennett RG, Garikapati K, Anderson RD, Silva K, Campbell T, Kotake Y, Turnbull S, Tonchev I, Lee G, Kalman J and Kumar S. Clinical, electroanatomic and electrophysiologic characterization and outcomes of catheter ablation for ventricular tachycardia following valvular intervention. J Cardiovasc Electrophysiol. 2022 Apr; 33(4):589-604. doi: 10.1111/jce.15388
  118. Campbell T, Bennett RG, Anderson RD, Turnbull S and Kumar S. Influence of respiration and tissue contact on ventricular substrate identification during high density mapping: Results from an ovine infarct model. J Cardiovasc Electrophysiol. 2022 Jul; 33(7):1494-1504. doi: 10.1111/jce.15487
  119. De Silva K, Nassar N, Badgery-Parker T, Kumar S, Taylor L, Kovoor P, Zaman S, Wilson A and Chow CK. Sex-Based Differences in Selected Cardiac Implantable Electronic Device Use: A 10-Year Statewide Patient Cohort. J Am Heart Assoc. 2022 Aug 16; 11(16):e025428. doi: 10.1161/JAHA.121.025428
  120. Harapoz M, Zada M, Matthews J, Kumar S and Thomas L. Echocardiographic predictors of ventricular arrhythmias in patients with nonischemic cardiomyopathy. Int J Cardiol Heart Vasc. 2022 Apr; 39:100962. doi: 10.1016/j.ijcha.2022.100962
  121. Hawson J, Anderson RD, Al-Kaisey A, Chieng D, Segan L, Watts T, Campbell T, Morton J, McLellan A, Kistler P, Voskoboinik A, Pathik B, Kumar S, Kalman J and Lee G. Functional Assessment of Ventricular Tachycardia Circuits and Their Underlying Substrate Using Automated Conduction Velocity Mapping. JACC Clin Electrophysiol. 2022 Apr; 8(4):480-494. doi: 10.1016/j.jacep.2021.12.013
  122. Huang K, Bennett RG, Campbell T, Lee V, Turnbull S, Chik WWB, El-Sokkari I, Hallani H, Dieleman J, Kruit N, Eslick A, Priestley M, Burgess D, Thomas SP, Denniss AR, Chow CK and Kumar S. Early Catheter Ablation Versus Initial Medical Therapy for Ventricular Tachycardia Storm. Circ Arrhythm Electrophysiol. 2022 Dec; 15(12):e011129. doi: 10.1161/CIRCEP.122.011129
  123. Kanagaratnam A, Virk SA, Pham T, Anderson RD, Turnbull S, Campbell T, Bennett R, Thomas SP, Lee G and Kumar S. Catheter Ablation for Ventricular Tachycardia in Ischaemic Versus Non-Ischaemic Cardiomyopathy: A Systematic Review and Meta-Analysis. Heart Lung Circ. 2022 Aug; 31(8):1064-1074. doi: 10.1016/j.hlc.2022.02.014
  124. Kotake Y, Barua S, Kazi S, Virk S, Bhaskaran A, Campbell T, Bennett RG and Kumar S. Efficacy and safety of catheter ablation for Brugada syndrome: an updated systematic review. Clin Res Cardiol. 2022 Apr 22. doi: 10.1007/s00392-022-02020-3
  125. Kotake Y, Campbell T, Bennett RG, Kruit N, Eslick A and Kumar S. Recurrent ventricular fibrillation storm triggered by repetitive premature ventricular contractions in the acute phase of myocardial infarction treated with empiric scar homogenisation. Intern Med J. 2022 Mar; 52(3):506-507. doi: 10.1111/imj.15716
  126. Kotake Y, Nalliah CJ, Campbell T, Bennett RG, Turnbull S and Kumar S. Correction to: Comparison of the arrhythmogenic substrate for ventricular tachycardia in patients with ischemic vs non-ischemic cardiomyopathy – insights from high-density, multi-electrode catheter mapping. J Interv Card Electrophysiol. 2022 Feb 18. doi: 10.1007/s10840-022-01129-9
  127. Laranjo L, Shaw T, Trivedi R, Thomas S, Charlston E, Klimis H, Thiagalingam A, Kumar S, Tan TC, Nguyen TN, Marschner S and Chow C. Coordinating Health Care With Artificial Intelligence-Supported Technology for Patients With Atrial Fibrillation: Protocol for a Randomized Controlled Trial. JMIR Res Protoc. 2022 Apr 13; 11(4):e34470. doi: 10.2196/34470
  128. Munot S, Redfern J, Bray JE, Angell B, Bauman A, Coggins A, Denniss AR, Ferry C, Jennings G, Kovoor P, Kumar S, Lai K, Khanlari S, Marschner S, Middleton PM, Nelson M, Opperman I, Semsarian C, Taylor L, Vukasovic M, Ware S and Chow C. Improving community-based first response to out of hospital cardiac arrest (FirstCPR): protocol for a cluster randomised controlled trial. BMJ Open. 2022 Jun 9; 12(6):e057175. doi: 10.1136/bmjopen-2021057175
  129. Rao K, Danaila V, Bennett RG, Turnbull S, Campbell T and Kumar S. Correlation of exit sites of inducible ventricular tachycardia post-ST elevation myocardial infarction on electrophysiology study, with region of infarct. Intern Med J. 2022 Jul 31. doi: 10.1111/imj.15891
  130. Sidhu K, Castrini AI, Parikh V, Reza N, Owens A, Tremblay-Gravel M, Wheeler MT, Mestroni L, Taylor M, Graw S, Gigli M, Merlo M, Paldino A, Sinagra G, Judge DP, Ramos H, Mesubi O, Brown E, Turnbull S, Kumar S, Roy D, Tedrow UB, Ngo L, Haugaa K and Lakdawala NK. The response to cardiac resynchronization therapy in LMNA cardiomyopathy. Eur J Heart Fail. 2022 Apr; 24(4):685-693. doi: 10.1002/ejhf.2463
  131. Trivedi SJ, Campbell T, Davey CJ, Stefani L, Thomas L and Kumar S. Longitudinal strain with speckle-tracking echocardiography predicts electroanatomic substrate for ventricular tachycardia in nonischemic cardiomyopathy patients. Heart Rhythm O2. 2022 Apr; 3(2):176-185. doi: 10.1016/j.hroo.2022.02.002
  132. Wong KC, Nguyen TN, Marschner S, Turnbull S, Burns MJ, Ne JYA, Gopal V, Indrawansa AB, Trankle SA, Usherwood T, Kumar S, Lindley RI and Chow Patient-Led Mass Screening for Atrial Fibrillation in the Older Population Using Handheld Electrocardiographic Devices Integrated With a ClinicianCoordinated Remote Central Monitoring System: Protocol for a Randomized Controlled Trial and Process Evaluation. JMIR Res Protoc. 2022 Feb 1; 11(2):e34778. doi: 10.2196/34778
  133. Zeppenfeld K, Wijnmaalen AP, Ebert M, Baldinger SH, Berruezo A, Catto V, Vaseghi M, Arya A, Kumar S, de Riva M, Deneke T, Gaspar T, Soejima K, van Rein N, Tedrow UB, Piorkowski C, Shivkumar K, Carbucicchio C, Hindricks G and Stevenson WG. Clinical Outcomes in Patients With Dilated Cardiomyopathy and Ventricular Tachycardia. J Am Coll Cardiol. 2022 Sep 13; 80(11):1045-1056. doi: 10.1016/j.jacc.2022.06.035
  134. Bennett RG, Garikapati K, Campbell TG, Kotake Y, Turnbull S, Bhaskaran A, De Silva K, Kanawati J, Zhou J, Wong MS and Kumar S. Mortality after catheter ablation of structural heart disease related ventricular tachycardia. Int J Cardiol. 2023 May 22. doi: 10.1016/j.ijcard.2023.05.035
  135. Bennett RG, Turnbull S, Sood A, Aung M, Duncan E, Barman P, Thomas G, Nisbet AM and Kumar S. Emergency out-of-hours catheter ablation for ventricular arrhythmia storm: a UK and Australian experience. Europace.
    1. Aug 2; 25(9). doi: 10.1093/europace/euad215
  136. CAAD-VT investigators, Bennett RG, Campbell T, Garikapati K, Kotake Y, Turnbull S, Kanawati J, Wong MS, Qian P, Thomas SP, Chow CK, Kovoor P, Robert Denniss A, Chik W, Marschner S, Kistler P, Haqqani H, Rowe M, Voskoboinik A, Lee G, Jackson N, Sanders P, Roberts-Thomson K, Chan KH, Sy R, Pathak R, Kanagaratnam L, Chia K, El-Sokkari I, Hallani H, Kanthan A, Burgess D and Kumar S. A Prospective, Multicentre Randomised Controlled Trial Comparing Catheter Ablation Versus Antiarrhythmic Drugs in Patients With Structural Heart Disease Related Ventricular Tachycardia: The CAADVT Trial Protocol. Heart Lung Circ. 2023 Feb; 32(2):184-196. doi: 10.1016/j.hlc.2022.09.006
  137. Hawson J, Al-Kaisey A, Anderson RD, Chieng D, Segan L, Watts T, Campbell T, Morton J, McLellan A, Sparks P, Lee A, Gerstenfeld EP, Hsia HH, Voskoboinik A, Prabhu S, Pathik B, Kumar S, Kistler P, Kalman J and Lee G. Retrospective Window of Interest Annotation Provides New Insights Into Functional Channels in Ventricular Tachycardia Substrate. JACC Clin Electrophysiol. 2023 Jan; 9(1):1-16. doi: 10.1016/j.jacep.2022.10.025
  138. Hawson J, Van Nieuwenhuyse E, Van Den Abeele R, Al-Kaisey A, Anderson RD, Chieng D, Segan L, Watts T, Campbell T, Hendrickx S, Morton J, McLellan A, Kistler P, Lee A, Gerstenfeld EP, Hsia HH, Voskoboinik A, Pathik B, Kumar S, Kalman J, Lee G and Vandersickel N. Directed Graph Mapping for Ventricular Tachycardia: A Comparison to Established Mapping Techniques. JACC Clin Electrophysiol. 2023 Jul; 9(7 Pt 1):907-922. doi: 10.1016/j.jacep.2022.08.013
  139. Kotake Y, Barua S, Kazi S, Virk S, Bhaskaran A, Campbell T, Bennett RG and Kumar S. Correction to: Efficacy and safety of catheter ablation for Brugada syndrome: an updated systematic review. Clin Res Cardiol. 2023 Jun; 112(6):853. doi: 10.1007/s00392-022-02038-7
  140. Kotake Y, Bennett R, Silva K, Bhaskaran A, Kanawati J, Turnbull S, Zhou J, Kumar S and Campbell T. Correlation of spatial patterns of endocardial pace mapping to underlying scar topography in patients with scar-related ventricular tachycardia. J Cardiovasc Electrophysiol. 2023 Mar; 34(3):638649. doi: 10.1111/jce.15811
  141. Kotake Y, Huang K, Bennett R, De Silva K, Bhaskaran A, Kanawati J, Turnbull S, Zhou J, Campbell T and Kumar S. Efficacy and safety of catheter ablation as first-line therapy for the management of ventricular tachycardia. J Interv Card Electrophysiol. 2023 Feb 9. doi: 10.1007/s10840-023-01483-2 144) Kotake Y, Nalliah CJ, Campbell T, Bennett RG, Turnbull S and Kumar S. Comparison of the arrhythmogenic substrate for ventricular tachycardia in patients with ischemic vs non-ischemic cardiomyopathy – insights from highdensity, multi-electrode catheter mapping. J Interv Card Electrophysiol. Jan; 66(1):5-14. doi: 10.1007/s10840-021-01088-7
  142. Mundisugih J, Franke KB, Tully PJ, Munawar DA, Kumar S and Mahajan R. Prevalence and Prognostic Implication of Atrial Fibrillation in Heart Failure Subtypes: Systematic Review and Meta-Analysis. Heart Lung Circ. 2023 Jun; 32(6):666-677. doi: 10.1016/j.hlc.2023.02.009
  143. Munot S, Rugel EJ, Bray J, Redfern J, Yang G, Ngo L, Bauman A, Dang QM, Rock Z, Marschner S, Coggins A, Semsarian C, Middleton PM, Jennings G, Angell B, Kumar S, Kovoor P and Chow CK. Examining training and attitudes to basic life support in multi-ethnic communities residing in New South Wales, Australia: A mixed-methods investigation. BMJ Open. 2023 Jul 25; 13(7):e073481. doi: 10.1136/bmjopen-2023-073481
  144. Pham T, Bennett R, Kanawati J, Campbell T, Turnbull S, Thomas SP and Kumar S. Impact of sex on clinical, procedural characteristics and outcomes of catheter ablation for ventricular arrhythmias according to underlying heart disease. J Interv Card Electrophysiol. 2023 Jan; 66(1):203-213. doi: 10.1007/s10840-022-01188-y
  145. Selvakumar D, Wilkie E, Deshmukh T, Ravindran D, Kotake Y, Lu J, Barry T, Tran V, Paterson H, Hing A, Campbell T, Kumar S, Kizana E and Chong JJH. Delivery of Cardioactive Therapeutics in a Porcine Myocardial Infarction Model. J Vis Exp. 2023 Feb 10; (192). doi: 10.3791/64177
  146. Turnbull S, Garikapati K, Bennett RG, Campbell TG, Kotake Y, Mahajan R, Marschner S, Byth K, Chow CK and Kumar S. Utility of a Handheld, SingleLead ECG Device for Diagnosis of Cardiac Arrhythmias. J Am Coll Cardiol. 2023 Jun 13; 81(23):2292-2294. doi: 10.1016/j.jacc.2023.03.428
  147. Virk SA and Kumar S. Catheter Ablation of Ventricular Tachycardia in Patients With Structural Heart Disease: A Meta-Analysis. JACC Clin Electrophysiol. 2023 Feb; 9(2):255-257. doi: 10.1016/j.jacep.2022.09.002
  148. Munot S, Bray JE, Redfern J, Bauman A, Marschner S, Semsarian C, Denniss AR, Coggins A, Middleton PM, Jennings G, Angell B, Kumar S, Kovoor P, Vukasovic M, Bendall JC, Evens T, Chow CK. Bystander cardiopulmonary resuscitation differences by sex – The role of arrest recognition. Resuscitation. 2024 Jun;199:110224. doi: 10.1016/j.resuscitation.2024.110224. Epub 2024 Apr 27.
  149. Denham N, Ding WY, Campbell T, Modi S, Luther V, Todd D, Kumar S, Agarwal S, Mahida S. UltraSOUND-based characterization of ventricular tachycardia SCAR and arrhythmogenic substrate: The SOUNDSCAR study. Heart Rhythm. 2024 Jan;21(1):45-53. doi: 10.1016/j.hrthm.2023.10.022.
  150. Hawson J, Anderson RD, Das SK, Al-Kaisey A, Chieng D, Segan L, Watts T, Campbell T, Morton J, McLellan A, Sparks P, Lee A, Gerstenfeld EP, Hsia HH, Voskoboinik A, Pathik B, Kumar S, Kistler PM, Kalman J, Lee G. Optimal Annotation of Local Activation Time in Ventricular Tachycardia Substrate Mapping. JACC Clin Electrophysiol. 2024 Feb;10(2):206-218. doi: 10.1016/j.jacep.2023.10.014.
  151. Turnbull S, Garikapati K, Bennett RG, Campbell TG, Kotake Y, De Silva K, Mahajan R, Wong MS, Kazi S, Marschner S, Byth K, Thomas SP, Chow CK, Kumar S. Accuracy of a Single-Lead ECG Device for Diagnosis of Cardiac Arrhythmias Compared Against Cardiac Electrophysiology Study.Heart Lung Circ. 2024 Oct;33(10):1465-1474. doi: 10.1016/j.hlc.2024.05.008.
  152. Bhaskaran A, Deshmukh T, Bennett R, Turnbull S, Campbell TG, Kotake Y, Selvakumar D, Barry MA, Lu J, Pearson L, Kizana E, Chong JJH, Kumar S. Evolution of Substrate for Ventricular Arrhythmias Early Postinfarction: Insights From a Porcine Ischemia-Reperfusion Model. JACC Clin Electrophysiol. 2024 Oct;10(10):2158-2168. doi: 10.1016/j.jacep.2024.06.016.
  153. De Silva K, Campbell T, Bennett RG, Anderson RD, Davey C, O’Donohue AK, Schindeler A, Turnbull S, Selvakumar D, Bhaskaran A, Kotake Y, Hsu CJ, Chong JJH, Kizana E, Kumar S. Whole-Heart Histological and Electroanatomic Assessment of Postinfarction Cardiac Magnetic Resonance Imaging Scar and Conducting Channels. Circ Arrhythm Electrophysiol. 2024 Sep;17(9):e012922. doi: 10.1161/CIRCEP.124.012922.
  154. Selvakumar D, Clayton ZE, Prowse A, Dingwall S, Kim SK, Reyes L, George J, Shah H, Chen S, Leung HHL, Hume RD, Tjahjadi L, Igoor S, Skelton RJP, Hing A, Paterson H, Foster SL, Pearson L, Wilkie E, Marcus AD, Jeyaprakash P, Wu Z, Chiu HS, Ongtengco CFJ, Mulay O, McArthur JR, Barry T, Lu J, Tran V, Bennett R, Kotake Y, Campbell T, Turnbull S, Gupta A, Nguyen Q, Ni G, Grieve SM, Palpant NJ, Pathan F, Kizana E, Kumar S, Gray PP, Chong JJH. Cellular heterogeneity of pluripotent stem cell-derived cardiomyocyte grafts is mechanistically linked to treatable arrhythmias. Nat Cardiovasc Res. 2024 Feb;3(2):145-165. doi: 10.1038/s44161-023-00419-3.
  155. Wong KC, Nguyen TN, Marschner S, Turnbull S, Indrawansa AB, White R, Burns MJ, Gopal V, Min H, Quintans D, von Huben A, Trankle SA, Usherwood T, Lindley RI, Kumar S, Chow CK. A randomized controlled implementation study integrating patient self-screening with a remote central monitoring system to screen community dwellers aged 75 years and older for atrial fibrillation. Eur J Prev Cardiol. 2024 Dec 23;31(18):2104-2114. doi: 10.1093/eurjpc/zwae312.
  156. Bhaskaran A, De Silva K, Turnbull S, Wong W, Campbell T, Bennett RG, Ong A, Zaman S, Kumar S. Yield of Coronary Assessment in Sustained Monomorphic Ventricular Tachycardia. Heart Lung Circ. 2025 Jan;34(1):40-47. doi: 10.1016/j.hlc.2024.08.009.
  157. Campbell T, Bennett RG, Anderson RD, Davey C, O’Donohue AK, Schindeler A, De Silva K, Bhaskaran A, Turnbull S, Selvakumar D, Kotake Y, Hsu CJ, Chong JJH, Kizana E, Kumar S. Whole-Heart Histological and CMR Validation of Electroanatomic Mapping by Multielectrode Catheters in an Ovine Model. JACC Clin Electrophysiol. 2025 Jan 15:S2405-500X(24)01003-X. doi: 10.1016/j.jacep.2024.11.011.
  158. Sood A, Hui YJ, Turnbull S, De Silva K, Bhaskaran A, Campbell TG, Bennett RG, Wong MS, Kumar S. A critical analysis of online patient-directed resources on catheter ablation for ventricular arrhythmias. J Arrhythm. 2025 Mar 6;41(2):e70026. doi: 10.1002/joa3.70026.
  159.  Sood A, Turnbull S, De Silva K, Bhaskaran A, Bennett RG, Campbell TG, Thomas L, Kumar S. Impact of catheter ablation for ventricular tachycardia on left ventricular ejection fraction in patients with structural heart disease. J Arrhythm. 2025 Mar 17;41(2):e70042. doi: 10.1002/joa3.70042.
  160. Trivedi S, Bennett R, Byth K, Campbell T, Turnbull S, Stefani L, Kumar S, Thomas L. Speckle-tracking echocardiography parameters associated with ventricular arrhythmia recurrence-free survival post-ablation in structural heart disease. Journal of American Society of Echocardiography. Accepted May 2025,
  161. Bhaskaran A, Ben Yaou R, Helms AS, Fayssoil A, Richard P, Stojkovic T, Anselme F, Labombarda F, Chikhaoui C, De Sandre-Giovannoli A, Jeru I, Leturcq F, Vigouroux C, Dembele M, Elliott P, Savvatis K, Zeppenfeld K, Bouguerra H, Charron P, Kumar S, Bonne G, Wahibi K, Lakdawala N. Location of LMNA variants and clinical outcomes in cardiomyopathy – An international, multicentre registry-based study. JAMA cardiology. Accepted April 2025.
  162. De Silva K, So TC, Turnbull S, Bickley M, Hashimoto K, Bhaskaran A, Kumar S. Pulsed Field Ablation of Ventricular Arrhythmias arising from Intracavitary Structures: insights from a clinical case series. Journal of Interventional Cardiac Electrophysiology. Accepted May 2025.172) Bhaskaran A, Deshmukh T, Selvakumar D, Bennett R, Turnbull S, Campbell TG, Kotake Y, Barry MA, Lu J, Pearson L, Kizana E, Chong JH, Kumar S. Comparison of extrastimulus pacing strategies for the detection of arrhythmogenic substrate for ventricular tachycardia – Insights from a porcine ischemia-reperfusion injury model. Circulation: Arrhythmia & Electrophysiology. Accepted May 2025.
  163. De Silva K, Campbell T, Bennett R, Turnbull S, Bhaskaran A, Anderson R, Davey C, O’Donohue A, Schindeler A, Selvakumar D, Kotake Y, Hsu CJ, Chong J, Kizana E, Kumar S. Feasibility of machine learned intracardiac electrograms to predict post-infarction ventricular scar topography. Circulation: Arrhythmia & Electrophysiology. Accepted May 2025.
  164. De Silva K, So TC, Turnbull S, Bickley M, Hashimoto K, Bhaskaran A, Kumar S.Pulsed Field Ablation of Ventricular Arrhythmias arising from Intracavitary Structures: insights from a clinical case series. Journal of Interventional Cardiac Electrophysiology, Accepted, May 2025.
  165. Ravindran D, Rao R, Mundisugih J, Titus T, Tsurusaki S, Kok CY, Rashid FN, Igoor S, Kotake Y, Kumar S, Chong JJH, Alexander IE, Lisowski L, Kizana E. High-throughput evaluation of cardiac-specific promoters for adeno-associated virus mediated cardiac gene therapy. Gene Ther. 2025 Jul 19. doi: 10.1038/s41434-025-00553-6. Epub ahead of print. PMID: 40683992.
  166. Hashimoto K, Gupta A, So TC, Turnbull S, De Silva K, Bhaskaran A, Kotake Y, Campbell TG, Perera N, Kumar S. Feasibility of Upfront Surgical Subxiphoid Epicardial Access for Hybrid Ablation of Ventricular Tachycardia. JACC Clin Electrophysiol. 2025 Jun 19:S2405-500X(25)00443-8. doi: 10.1016/j.jacep.2025.05.018. Epub ahead of print. PMID: 40637656.
  167. Hashimoto K, Turnbull S, Bickley M, Bhaskaran A, Huang K, De Silva K, Kumar S. Clinical Outcomes After Catheter Ablation in Cardiac Sarcoidosis and Idiopathic Nonischemic Cardiomyopathy. J Cardiovasc Electrophysiol. 2025 Jun 12. doi: 10.1111/jce.16756. Epub ahead of print. PMID: 40503871.

PUBLICATIONS – Reviews

  1. Ryding AD, Kumar S, Worthington AM and Burgess D. Prognostic value of brain natriuretic peptide in noncardiac surgery: a meta-analysis. Anesthesiology. 2009 Aug; 111(2):311-9. doi: 10.1097/ALN.0b013e3181aaeb11
  2. Kumar S and Kalman JM. Recent advances in the treatment of atrial fibrillation. Medicine Today. 2012 13(10):16-26. doi:
  3. Kumar S, Teh AW, Medi C, Kistler PM, Morton JB and Kalman JM. Atrial remodeling in varying clinical substrates within beating human hearts: relevance to atrial fibrillation. Prog Biophys Mol Biol. 2012 Oct-Nov; 110(2-3):278-94. doi: 10.1016/j.pbiomolbio.2012.07.011
  4. Kumar S and Michaud GF. Unipolar electrogram morphology to assess lesion formation during catheter ablation of atrial fibrillation: successful translation into clinical practice. Circ Arrhythm Electrophysiol. 2013 Dec; 6(6):1050-2. doi: 10.1161/CIRCEP.113.001145
  5. McLellan AJ, Kumar S, Smith C, Morton JB, Kalman JM and Kistler PM. The role of adenosine following pulmonary vein isolation in patients undergoing catheter ablation for atrial fibrillation: a systematic review. J Cardiovasc Electrophysiol. 2013 Jul; 24(7):742-51. doi: 10.1111/jce.12121
  6. Kumar S, Stevenson WG and John RM. Catheter ablation for premature ventricular contractions and ventricular tachycardia in patients with heart failure. Curr Cardiol Rep. 2014 Sep; 16(9):522. doi: 10.1007/s11886-0140522-3
  7. Barbhayia CR, Kumar S and Michaud GF. Mapping Atrial Fibrillation: 2015 Update. J Atr Fibrillation. 2015 Dec; 8(4):1227. doi: 10.4022/jafib.1227
  8. Kumar S, Barbhaiya CR, Balindger S, John RM, Epstein LM, Koplan BA, Tedrow UB, Stevenson WG and Michaud GF. Better Lesion Creation And Assessment During Catheter Ablation. J Atr Fibrillation. 2015 Oct-Nov; 8(3):1189. doi: 10.4022/jafib.1189
  9. Kumar S, Stevenson WG and John RM. Arrhythmias in dilated cardiomyopathy. Card Electrophysiol Clin. 2015 Jun; 7(2):221-33. doi: 10.1016/j.ccep.2015.03.005
  10. Kumar S, Tedrow UB and Triedman JK. Arrhythmias in Adult Congenital Heart Disease: Diagnosis and Management. Cardiol Clin. 2015 Nov; 33(4):571-88, viii. doi: 10.1016/j.ccl.2015.07.007
  11. John RM and Kumar S. Sinus Node and Atrial Arrhythmias. Circulation. 2016 May 10; 133(19):1892-900. doi: 10.1161/CIRCULATIONAHA.116.018011
  12. Kumar S and Michaud GF. Pulmonary vein isolation in the treatment of atrial fibrillation. Research Reports in Clinical Cardiology. 2016 May; 7:47-60. doi: 10.2147/Rrcc.S56549
  13. Kumar S, Tedrow UB and Stevenson WG. Ventricular Arrhythmias from the Left Ventricular Summit: Critical Importance of Anatomy, Imaging, and Detailed Mapping to Allow Safe and Effective Ablation. Card Electrophysiol Clin. 2016 Mar; 8(1):89-98. doi: 10.1016/j.ccep.2015.10.009
  14. Davies RA, Kumar S, Chard RB and Thomas SP. Surgical and Hybrid Ablation of Atrial Fibrillation. Heart Lung Circ. 2017 Sep; 26(9):960-966. doi: 10.1016/j.hlc.2017.05.114
  15. Kumar S, Tedrow UB and Stevenson WG. Adjunctive Interventional Techniques When Percutaneous Catheter Ablation for Drug Refractory Ventricular Arrhythmias Fail: A Contemporary Review. Circ Arrhythm Electrophysiol. 2017 Feb; 10(2):e003676. doi: 10.1161/CIRCEP.116.003676
  16. Kumar S, Tedrow UB and Stevenson WG. Entrainment Mapping. Card Electrophysiol Clin. 2017 Mar; 9(1):55-69. doi: 10.1016/j.ccep.2016.10.004
  17. Romero J, Estrada R, Holmes A, Goodman-Meza D, Diaz JC, Briceno D, Kumar S, Baldinger SH, Valencia CR, Roth N, Fisher JD, Gross J, Krumerman A, Ferrick K, Kim S, Pina IL, Garcia M and Di Biase L. Atrial fibrillation inducibility during cavo-tricuspid isthmus dependent atrial flutter ablation for the prediction of clinical atrial fibrillation. Int J Cardiol. 2017 Aug 1; 240:246-250. doi: 10.1016/j.ijcard.2017.01.131
  18. Ariyarathna N, Kumar S, Thomas SP, Stevenson WG and Michaud GF. Role of Contact Force Sensing in Catheter Ablation of Cardiac Arrhythmias: Evolution or History Repeating Itself? JACC Clin Electrophysiol. 2018 Jun; 4(6):707-723. doi: 10.1016/j.jacep.2018.03.014
  19. Farraha M, Kumar S, Chong J, Cho HC and Kizana E. Gene Therapy Approaches to Biological Pacemakers. J Cardiovasc Dev Dis. 2018 Oct 19; 5(4). doi: 10.3390/jcdd5040050
  20. Anderson RD, Kumar S, Kalman JM, Sanders P, Sacher F, Hocini M, Jais P, Haisaguerre M and Lee G. Catheter Ablation of Ventricular Fibrillation. Heart Lung Circ. 2019 Jan; 28(1):110-122. doi: 10.1016/j.hlc.2018.09.005
  21. Anderson RD, Kumar S, Parameswaran R, Wong G, Voskoboinik A, Sugumar H, Watts T, Sparks PB, Morton JB, McLellan A, Kistler PM, Kalman and Lee G. Differentiating Right- and Left-Sided Outflow Tract Ventricular Arrhythmias: Classical ECG Signatures and Prediction Algorithms. Circ Arrhythm Electrophysiol. 2019 Jun; 12(6):e007392. doi: 10.1161/CIRCEP.119.007392
  22. Anderson RD, Lee G, Virk S, Bennett RG, Hayward CS, Muthiah K, Kalman J and Kumar S. Catheter Ablation of Ventricular Tachycardia in Patients With a Ventricular Assist Device: A Systematic Review of Procedural Characteristics and Outcomes. JACC Clin Electrophysiol. 2019 Jan; 5(1):39-51. doi: 10.1016/j.jacep.2018.08.009
  23. Bennett RG, Haqqani HM, Berruezo A, Della Bella P, Marchlinski FE, Hsu CJ and Kumar S. Arrhythmogenic Cardiomyopathy in 2018-2019: ARVC/ALVC or Both? Heart Lung Circ. 2019 Jan; 28(1):164-177. doi: 10.1016/j.hlc.2018.10.013
  24. Bhaskaran A, Tung R, Stevenson WG and Kumar S. Catheter Ablation of VT in Non-Ischaemic Cardiomyopathies: Endocardial, Epicardial and Intramural Approaches. Heart Lung Circ. 2019 Jan; 28(1):84-101. doi: 10.1016/j.hlc.2018.10.007
  25. Geraghty L, Santangeli P, Tedrow UB, Shivkumar K and Kumar S. Contemporary Management of Electrical Storm. Heart Lung Circ. 2019 Jan; 28(1):123-133. doi: 10.1016/j.hlc.2018.10.005
  26. Haqqani HM, Chan KH, Kumar S, Denniss AR and Gregory AT. The Contemporary Era of Sudden Cardiac Death and Ventricular Arrhythmias: Basic Concepts, Recent Developments and Future Directions. Heart Lung Circ. 2019 Jan; 28(1):1-5. doi: 10.1016/S1443-9506(18)31972-3
  27. Peters S, Kumar S, Elliott P, Kalman JM and Fatkin D. Arrhythmic Genotypes in Familial Dilated Cardiomyopathy: Implications for Genetic Testing and Clinical Management. Heart Lung Circ. 2019 Jan; 28(1):31-38. doi: 10.1016/j.hlc.2018.09.010
  28. Romero J, Shivkumar K, Di Biase L, Avendano R, Anderson RD, Natale A and Kumar S. Mastering the art of epicardial access in cardiac electrophysiology. Heart Rhythm. 2019 Nov; 16(11):1738-1749. doi: 10.1016/j.hrthm.2019.04.038
  29. Virk SA, Bennett RG, Trivic I, Campbell T and Kumar S. Contact Force and Ablation Index. Card Electrophysiol Clin. 2019 Sep; 11(3):473-479. doi: 10.1016/j.ccep.2019.05.007
  30. Virk SA, Keren A, John RM, Santageli P, Eslick A and Kumar S. Mechanical Circulatory Support During Catheter Ablation of Ventricular Tachycardia: Indications and Options. Heart Lung Circ. 2019 Jan; 28(1):134-145. doi: 10.1016/j.hlc.2018.10.006
  31. Bennett R, Campbell T and Kumar S. Catheter and Device Management of Inherited Cardiac Conditions. Heart Lung Circ. 2020 Apr; 29(4):594-606. doi: 10.1016/j.hlc.2019.12.009
  32. Bhaskaran A, De Silva K, Rao K, Campbell T, Trivic I, Bennett RG, Kizana E and Kumar S. Ventricular Tachycardia Ablation in Non-ischemic Cardiomyopathy. Korean Circ J. 2020 Mar; 50(3):203-219. doi: 10.4070/kcj.2019.0292
  33. Ravindran D, Kok C, Farraha M, Selvakumar D, Clayton ZE, Kumar S, Chong J and Kizana E. Gene and Cell Therapy for Cardiac Arrhythmias. Clin Ther. 2020 Oct; 42(10):1911-1922. doi: 10.1016/j.clinthera.2020.09.001
  34. Alphonse P, Virk S, Collins J, Campbell T, Thomas SP, Semsarian C and Kumar S. Prognostic impact of atrial fibrillation in hypertrophic cardiomyopathy: a systematic review. Clin Res Cardiol. 2021 Apr; 110(4):544-554. doi: 10.1007/s00392-020-01730-w
  35. Bhaskaran A, Campbell T, Virk S, Bennett RG, Kizana E and Kumar S. Electrophysiologic and electroanatomic characterization of ventricular arrhythmias in non-compaction cardiomyopathy: A systematic review. J Cardiovasc Electrophysiol. 2021 May; 32(5):1421-1429. doi: 10.1111/jce.15026
  36. Campbell T, Bennett RG and Kumar S. Intracardiac Echocardiography to Guide the Ablation of Parahisian Arrhythmias. Card Electrophysiol Clin. 2021 Jun; 13(2S):e1-e16. doi: 10.1016/j.ccep.2022.01.001
  37. Campbell T, Haqqani H and Kumar S. Intracardiac Echocardiography to Guide Mapping and Ablation of Arrhythmias in Patients with Congenital Heart Disease. Card Electrophysiol Clin. 2021 Jun; 13(2):345-356. doi: 10.1016/j.ccep.2021.03.001
  38. Davis L, Chik W, Kumar S, Sivagangabalan G, Thomas SP and Denniss AR. Axillary vein access using ultrasound guidance, Venography or Cephalic Cutdown-What is the optimal access technique for insertion of pacing leads? Arrhythm. 2021 Dec; 37(6):1506-1511. doi: 10.1002/joa3.12639 
  39. Kim SK, Bennett R, Ingles J, Kumar S and Zaman S. Arrhythmia in Cardiomyopathy: Sex and Gender Differences. Curr Heart Fail Rep. 2021 Oct; 18(5):274-283. doi: 10.1007/s11897-021-00531-0
  40. Garikapati K, Turnbull S, Bennett RG, Campbell TG, Kanawati J, Wong MS, Thomas SP, Chow CK and Kumar S. The Role of Contemporary Wearable and Handheld Devices in the Diagnosis and Management of Cardiac Arrhythmias. Heart Lung Circ. 2022 Nov; 31(11):1432-1449. doi: 10.1016/j.hlc.2022.08.001
  41. Hawson J, Al-Kaisey A, Anderson RD, Watts T, Morton J, Kumar S, Kistler P, Kalman J and Lee G. Substrate-based approaches in ventricular tachycardia ablation. Indian Pacing Electrophysiol J. 2022 Nov-Dec; 22(6):273-285. doi: 10.1016/j.ipej.2022.08.002
  42. Kanawati J, De Silva K, Bhaskaran A, Turnbull S, Zhou J, Kotake Y, Kumar S and Campbell T. Intracardiac echocardiography techniques to identify ventricular arrhythmia substrate. Heart Rhythm O2. 2022 Oct; 3(5):602-612. doi: 10.1016/j.hroo.2022.06.006
  43. Bhaskaran A, De Silva K and Kumar S. Contemporary updates on ventricular arrhythmias: from mechanisms to management. Intern Med J. 2023 Jun; 53(6):892-906. doi: 10.1111/imj.15976
  44. De Silva K, Haqqani H, Mahajan R, Qian P, Chik W, Voskoboinik A, Kistler PM, Lee G, Jackson N and Kumar S. Catheter Ablation vs Antiarrhythmic Drug Therapy for Treatment of Premature Ventricular Complexes: A Systematic Review. JACC Clin Electrophysiol. 2023 Jun; 9(6):873-885. doi: 10.1016/j.jacep.2023.01.035
  45. Hawson J, Joshi S, Al-Kaisey A, Das SK, Anderson RD, Morton J, Kumar S, Kistler P, Kalman J and Lee G. Utility of cardiac imaging in patients with ventricular tachycardia. Indian Pacing Electrophysiol J. 2023 Mar 21. doi: 10.1016/j.ipej.2023.03.003
  46. Gupta A, Danaila V, De Silva K, Bhaskaran A, Turnbull S, Wong MS, Campbell TG, Kumar S. The Current Landscape of Ventricular Tachycardia Trials: A Systematic Review of Registered Studies. Heart Lung Circ. 2024 May 30:S1443-9506(24)00121-5. doi: 10.1016/j.hlc.2024.01.041. Epub ahead of print.
  47. Liulu X, Balaji P, Barber J, De Silva K, Murray T, Hickey A, Campbell T, Harris J, Gee H, Ahern V, Kumar S, Hau E, Qian PC. Radiation therapy for ventricular arrhythmias. J Med Imaging Radiat Oncol. 2024 May 2. doi: 10.1111/1754-9485.13662. Epub ahead of print.
  48. Lenarczyk R, Zeppenfeld K, Tfelt-Hansen J, Heinzel FR, Deneke T, Ene E, Meyer C, Wilde A, Arbelo E, Jędrzejczyk-Patej E, Sabbag A, Stühlinger M, di Biase L, Vaseghi M, Ziv O, Bautista-Vargas WF, Kumar S, Namboodiri N, Henz BD, Montero-Cabezas J, Dagres N, Peichl P, Frontera A, Tzeis S, Merino JL, Soejima K, de Chillou C, Tung R, Eckardt L, Maury P, Hlivak P, Tereshchenko LG, Kojodjojo P, Atié J. Management of patients with an electrical storm or clustered ventricular arrhythmias: a clinical consensus statement of the European Heart Rhythm Association of the ESC-endorsed by the Asia-Pacific Heart Rhythm Society, Heart Rhythm Society, and LatinAmerican Heart Rhythm Society. Europace. 2024 Mar 30;26(4):euae049. doi: 10.1093/europace/euae049. PMID: 38584423.
  49. Mundisugih J, Kumar S, Kizana E. Adeno-associated virus-mediated gene therapy for cardiac tachyarrhythmia: A systematic review and meta-analysis. Heart Rhythm. 2024 Jun;21(6):939-949. doi: 10.1016/j.hrthm.2024.02.001. Epub 2024 Feb 7.
  50. Gupta A, Prabhu MA, Anderson RD, Prasad SB, Campbell T, Turnbull S, Lee G, Skinner JR, Kalman J, Kumar S. Ebstein’s anomaly: an electrophysiological perspective. J Interv Card Electrophysiol. 2024 Jun;67(4):887-900. doi: 10.1007/s10840-024-01744-8. Epub 2024 Jan 30. PMID: 38289561.
  51. Das SK, Hawson J, Koh Y, Lim MW, D’Ambrosio P, Virk SA, Liang D, Watts T, Padilla JR, Nanthakumar K, Kumar S, Wong M, Sparks PB, Al-Kaisey A, Pathik B, McLellan A, Morton JB, Kistler PM, Kalman JM, Lee G, Anderson RD. Left Ventricular Summit Arrhythmias: State-of-the-Art Review of Anatomy, Mapping, and Ablation Strategies. JACC Clin Electrophysiol. 2024 Nov;10(11):2516-2539. doi: 10.1016/j.jacep.2024.09.008.
  52. Mundisugih J, Bhaskaran A, Huang K, De Silva K, Turnbull S, So TC, Hashimoto K, Gupta A, Bennett RG, Kotake Y, Bickley M, Campbell T, Kumar S. Stepwise Approach to Ventricular Tachycardia Ablation in Structural Heart Disease. Heart Lung Circ.

PUBLICATIONS – Book Chapters

  1. Kumar S, Sanders P and Kalman J. Typical and Atypical Atrial Flutter: Mapping and Ablation. In: Zipes DP, Jalife J, editors Cardiac Electrophysiology: From Cell to Bedside. 6th Edition. Philadelphia: Saunders. 2013: 723-738.
  2. Kumar S and Epstein L. Supraventricular Tachycardia. In: Scientific American Medicine. 2016.
  3. Kumar S and Michaud GF. Atrial Fibrillation. In: Zipes, Cardiac Electrophysiology: From Cell to Bedside. 7th Edition. Philadelphia: Saunders. 2016.
  4. Nalliah C, Kumar S, Pathik B, Sanders P and Kalman J. Typical and Atypical Atrial Flutter: Mapping and Ablation. In: Zipes, Cardiac Electrophysiology: From Cell to Bedside. 7th Edition. Philadelphia: Saunders. 2016.
  5. Kapur S and Kumar S. Atrial fibrillation in Congenital Heart Disease. In: The European Society of Cardiology Textbook in Cardiovascular Medicine. 3rd Edition. 2017.
  6. Kumar S and Michaud GF. Atrial Fibrillation: Mechanisms, Clinical Features, and Management. In: Cardiac Electrophysiology: From Cell to Bedside: Seventh Edition. 2018: 724-735.
  7. Nalliah CJ, Kumar S, Sanders P and Kalman JM. Typical and Atypical Atrial Flutter: Mapping and Ablation. In: Cardiac Electrophysiology: From Cell to Bedside: Seventh Edition. 2018: 713-723.
  8. Bennett R, Bhaskaran A and Kumar S. Lamin A/C, non-compaction and other genetic cardiomyopathies with ventricular arrhythmias. In: Zipes, Cardiac Electrophysiology: From Cell to Bedside. 8th Edition. 2020.
  9. De Silva K, Kumar S, Campbell T, Trivic I and Stevenson WG. Micropuncture needle for epicardial access. In: Percutaneous epicardial interventions: a guide for cardiac electrophysiologists by d’Avila A, Aryana A, Reddy V, Marchlinski FE. Cardiotext Publishing. 2020.
  10. Kumar S and Michaud GF. Atrial Fibrillation. In: Zipes, Cardiac Electrophysiology: From Cell to Bedside. 8th Edition. 2020.
  11. Nalliah C, Kumar S, Pathik B, Sanders P and Kalman J. Typical and Atypical Atrial Flutter: Mapping and Ablation. In: Zipes, Cardiac Electrophysiology: From Cell to Bedside. 8th Edition. 2020.
  12. Bhaskaran A, Kumar S, Michaud GF. Atrial fibrillation. Mechanisms, Clinical Features, Management. In: Zipes, Cardiac Electrophysiology: From Cell to Bedside. 9th Edition. 2025.

PUBLICATIONS – Letters, Editorials and Case Reports

  1. Kumar S, Kanthan A and Abraham RD. Where are my testes? Lancet. 2009 Apr 11; 373(9671):1310. doi: 10.1016/S0140-6736(09)60508-0
  2. Ryding A, Kumar S and Bhindi R. Letter by Ryding et al regarding article, “Impact of pretreatment with clopidogrel on initial patency and outcome in patients treated with primary percutaneous coronary intervention for STsegment elevation myocardial infarction: a systematic review”. Circulation. Jul 28; 120(4):e26; author reply e27. doi: 10.1161/CIRCULATIONAHA.108.839746
  3. Kumar S, Kanthan A and Jagger J. Upturned, broken heart. Intern Med J.Feb; 40(2):164-5. doi: 10.1111/j.1445-5994.2009.02121.x
  4. Kumar S, Sivagangabalan G and Kovoor P. Reply. The American Journal of Cardiology. 2010 105(11):1649-1650. doi: 10.1016/j.amjcard.2010.03.007
  5. Kumar S and Vohra J. Ivabradine: appropriate treatment for inappropriate sinus tachycardia. Heart Rhythm. 2010 Sep; 7(9):1324-5. doi: 10.1016/j.hrthm.2010.06.012
  6. Kumar S, Sivagangabalan G, Zaman S and Kovoor P. Author Reply-ICD Implantation Early After Acute ST Elevation Myocardial Infarction. Heart Rhythm. 2011 Jan; 8(1). doi: 10.1016/j.hrthm.2010.10.028
  7. Kalman JM, Kumar S and Sanders P. Markers of collagen synthesis, atrial fibrosis, and the mechanisms underlying atrial fibrillation. J Am Coll Cardiol. 2012 Oct 30; 60(18):1807-8. doi: 10.1016/j.jacc.2012.06.049
  8. Kumar S and Kalman JM. Catheter ablation for atrial fibrillation in the real world–insights from the J-CARAF registry. Circ J. 2014 78(5):1055-7. doi: 10.1253/circj.cj-14-0338
  9. Kumar S and Michaud GF. The inconvenient truth of elevated left atrial pressure and AF recurrence despite catheter ablation. Heart Rhythm. 2014 Jun; 11(6):961-2. doi: 10.1016/j.hrthm.2014.03.047
  10. Kumar S, Sharma R and Kalman JM. Unmasking of familial long QT syndrome type 2 with crystal methamphetamine exposure. Heart Rhythm. 2014 Oct; 11(10):1836-8. doi: 10.1016/j.hrthm.2014.05.034
  11. Baldinger SH, Kumar S, Enriquez AD, Sobieszczyk PS, John R and Stevenson WG. Options for ventricular tachycardia ablation after double valve replacement. HeartRhythm Case Rep. 2015 Jul; 1(4):163-166. doi: 10.1016/j.hrcr.2015.02.007
  12. Baldinger SH, Nagashima K, Kumar S, Barbhaiya CR, Choi EK, Epstein LM, Michaud GF, John R, Tedrow UB and Stevenson WG. Response to Letter Regarding Article, “Electrogram Analysis and Pacing Are Complimentary for Recognition of Abnormal Conduction and Far-Field Potentials During Substrate Mapping of Infarct-Related Ventricular Tachycardia”. Circ Arrhythm Electrophysiol. 2015 Dec; 8(6):1521. doi: 10.1161/CIRCEP.115.003696
  13. Michaud GF and Kumar S. Catheter Ablation for Paroxysmal Atrial Fibrillation: Triggers and Thoughts Provoked by Adenosine. JACC Clin Electrophysiol. 2015 Jun; 1(3):136-138. doi: 10.1016/j.jacep.2015.04.007
  14. Kumar S, Calkins H and Michaud GF. Contact Force-Guided Pulmonary Vein Isolation: The Quest for Perfection Continues. JACC Clin Electrophysiol. 2016 Nov; 2(6):700-702. doi: 10.1016/j.jacep.2016.09.008
  15. Kumar S and Kalman JM. Brugada Syndrome Diagnosed from the ECG Leads in the High Intercostal Spaces: Searching for Answers from a Higher Source? J Cardiovasc Electrophysiol. 2016 Aug; 27(8):944-6. doi: 10.1111/jce.13016
  16. Kumar S and Michaud GF. Catheter Ablation for Paroxysmal Atrial Fibrillation: Time to Focus More on Trigger Ablation? Circ Arrhythm Electrophysiol. 2016 May; 9(5). doi: 10.1161/CIRCEP.116.004129
  17. Kumar S, Sparks PB and Kalman JM. Letter by Kumar et al Regarding Article, “Extensive Intramural Esophageal Hematoma After Transesophageal Echocardiography During Atrial Fibrillation Ablation”. Circulation. 2016 Apr 12; 133(15):e594. doi: 10.1161/CIRCULATIONAHA.115.020368
  18. Kumar S and Tedrow UB. Catheter Ablation of Ventricular Tachycardia in the Setting of Known LV Thrombus: Between Scylla and Charybdis? J Cardiovasc Electrophysiol. 2016 Apr; 27(4):460-2. doi: 10.1111/jce.12921
  19. Michaud GF and Kumar S. Surgical Ganglionic Plexus Ablation in Atrial Fibrillation: Is All Hope Lost for the Plexus? J Am Coll Cardiol. 2016 Sep 13; 68(11):1166-1168. doi: 10.1016/j.jacc.2016.07.731
  20. Michaud GF and Kumar S. Eliminating Coagulum Formation With Charge Delivery During Radiofrequency Ablation: Negative May Be a Positive! JACC Clin Electrophysiol. 2016 Apr; 2(2):242-245. doi: 10.1016/j.jacep.2016.01.012
  21. Kumar S, Kalman JM and La Gerche A. New International Guidelines for the Interpretation of the Electrocardiograph in Athletes: a “Traffic Light” Tool for Maximising Diagnostic Specificity. Heart Lung Circ. 2017 Nov; 26(11):1119-doi: 10.1016/j.hlc.2017.09.001
  22. Kumar S, Stevenson WG and Tedrow UB. Bicuspid aortic valve supporting supravalvular “substrate” for multiple ventricular tachycardias. HeartRhythm Case Rep. 2017 Mar; 3(3):155-158. doi: 10.1016/j.hrcr.2016.09.006
  23. Bhaskaran A, Kumar S, Kizana E, Thomas SP and Chik WWB. Multimodality imaging, electrophysiologic, electroanatomic, and histopathologic characterization of atrial sarcoidosis presenting with sinus arrest and reentrant right atrial flutter. HeartRhythm Case Rep. 2018 Oct; 4(10):469-doi: 10.1016/j.hrcr.2018.06.014
  24. Anderson RD, Ada C, Lee G, Kalman JM, Vohra JK and Kumar S. Incessant Idiopathic Ventricular Fibrillation Trigger Originating From an Unusual Intramyocardial (Non-Purkinje) Site Successfully Treated With Catheter Ablation. JACC Clin Electrophysiol. 2019 Feb; 5(2):260-262. doi: 10.1016/j.jacep.2018.10.014
  25. Bhaskaran A, Bhat A, Trivic I, Muthiah K, Barrett W, Liang S, Kanthan A and Kumar S. Biventricular, endocardial, and epicardial substrate characterization for ventricular tachycardia and correlation with whole-heart macropathology and histopathology in a patient with lamin A/C cardiomyopathy. HeartRhythm Case Rep. 2019 Mar; 5(3):128-133. doi: 10.1016/j.hrcr.2018.11.009
  26. Bhaskaran A, Campbell T, Trivic I, Tanous DJ and Kumar S. Left Ventricular Outflow Tract Ventricular Tachycardia Late Post-Arterial Switch for DTransposition of the Great Arteries. JACC Clin Electrophysiol. 2019 Sep; 5(9):1096-1097. doi: 10.1016/j.jacep.2019.06.012
  27. Zada M, Tanous D, Thomas SP, Kumar S and Kizana E. Bradycardiainduced polymorphic ventricular tachycardia after radiofrequency catheter ablation for right atrial flutter. HeartRhythm Case Rep. 2019 Aug; 5(8):414-doi: 10.1016/j.hrcr.2019.04.009
  28. De Silva K, Chow C and Kumar S. A Smartwatch to Identify Atrial Fibrillation. N Engl J Med. 2020 Mar 5; 382(10):974. doi: 10.1056/NEJMc1916858
  29. Kumar S and Bhaskaran A. Atrial Fibrillation in Transthyretin Cardiac Amyloidosis: The Growing Need to Look Forward. JACC Clin Electrophysiol. 2020 Sep; 6(9):1128-1130. doi: 10.1016/j.jacep.2020.05.017
  30. Virk S and Kumar S. The quandary of study design in evaluating effectiveness of contact force sensing catheter in atrial fibrillation ablation: Authors’ reply. Europace. 2020 May 1; 22(5):840. doi: 10.1093/europace/euaa022
  31. Anderson RD, Lee G, Campbell T, Hawson J, Thomas SP and Kumar S. First-in-Man Rapid, Ultra-high-resolution Mapping of the Outflow Tracts Using the Advisor HD Grid Catheter. J Innov Card Rhythm Manag. 2021 Jan; 12(Suppl 1):39-40. doi: 10.19102/icrm.2021.120107S
  32. Bennett R, Campbell T, Eslick A, Pudipeddi A, Hing A, Yeates L, Hanna B and Kumar S. Ventricular Tachycardia in a Patient With Dilated Cardiomyopathy Caused by a Novel Mutation of Lamin A/C Gene: Insights From Features on Electroanatomic Mapping, Catheter Ablation and Tissue Pathology. Heart Lung Circ. 2021 Feb; 30(2):310-317. doi: 10.1016/j.hlc.2020.08.024
  33. Bennett RG, Campbell TG and Kumar S. Automatic identification of VT substrate in the era of ultrahigh-density mapping: Do humans or machines emerge victoriously? J Cardiovasc Electrophysiol. 2021 Aug; 32(8):22252227. doi: 10.1111/jce.15146
  34. Deshmukh T, Kumar S and Chong JJH. Cardiac Inflammation After Myocardial Infarction and its Impact on Ventricular Arrhythmias. Heart Lung Circ. 2021 Jun; 30(6):783-785. doi: 10.1016/j.hlc.2021.03.008
  35. Kotake Y, Nalliah CJ, Campbell T, Trivic I, Ross N, Bennett RG, Turnbull S and Kumar S. Epicardial-Endocardial Reentry in Ischemic Cardiomyopathy. J Innov Card Rhythm Manag. 2021 Apr; 12(4):4467-4472. doi: 10.19102/icrm.2021.120402
  36. Campbell T, Bennett RG and Kumar S. How do you like your esophagus: Rare, medium, or well done? J Cardiovasc Electrophysiol. 2022 Feb; 33(2):231-233. doi: 10.1111/jce.15309
  37. Davis L, Chik W, Thomas S, Kumar S and Sivagangabalan G. EHRA expert consensus statement and practical guide on optimal implantation technique for conventional pacemakers and implantable cardioverter-defibrillators: endorsed by the Heart Rhythm Society (HRS), the Asia Pacific Heart Rhythm Society (APHRS), and the Latin-American Heart Rhythm Society (LAHRS)-a role for post-operative ultrasound? Europace. 2022 Mar 2; 24(3):523. doi: 10.1093/europace/euab263
  38. De Silva K and Kumar S. Catheter Ablation for Atrial Fibrillation: Are We Isolating Our Most Vulnerable Patients? Heart Lung Circ. 2022 Oct; 31(10):1315-1317. doi: 10.1016/j.hlc.2022.08.004
  39. Hawson J, Kalman J, Goldblatt J, Anderson RD, Watts T, Hardcastle N, Siva S, Kumar S and Lee G. From minimally to maximally invasive; VT ablation in the setting of mechanical aortic and mitral valves. J Cardiovasc Electrophysiol. 2022 Sep; 33(9):2116-2120. doi: 10.1111/jce.15623
  40. Kanawati J and Kumar S. Atrial Fibrillation Clinics: The Way of the Future. Heart Lung Circ. 2022 Feb; 31(2):155-157. doi: 10.1016/j.hlc.2021.12.002
  41. Kotake Y, Kanawati J and Kumar S. Will the insulated-tip radiofrequency catheter transform ablation procedures? J Cardiovasc Electrophysiol. 2022 Jun; 33(6):1157-1159. doi: 10.1111/jce.15463
  42. Skinner JR and Kumar S. Investigation of sudden cardiac arrest: Time to put guidelines into practice. Resuscitation. 2022 Oct; 179:36-37. doi: 10.1016/j.resuscitation.2022.07.024
  43. Turnbull S, Kotake Y, Kanawati J, Campbell T and Kumar S. Percutaneous phrenic nerve displacement using an oesophageal balloon to abolish epicardial ventricular tachycardia circuits in a patient with nonischaemic cardiomyopathy. Intern Med J. 2022 Sep; 52(9):1643-1644. doi: 10.1111/imj.15900
  44. Turnbull S, Kumar S and Campbell T. Surgical Cryoablation of Malignant Papillary Muscle Arrhythmias During Mitral Valve Prolapse Surgery – Putting a Freeze on Sudden Cardiac Death. Heart Lung Circ. 2022 Oct; 31(10):1318-doi: 10.1016/j.hlc.2022.08.005
  45. Campbell T and Kumar S. Self-administered intranasal medication to terminate supraventricular tachycardia. Lancet. 2023 Jun 15. doi: 10.1016/S0140-6736(23)00823-1
  46. De Silva K, Campbell T and Kumar S. PCI for Ischemic Left Ventricular Dysfunction. N Engl J Med. 2023 Jan 12; 388(2):186-187. doi: 10.1056/NEJMc2214569
  47. Kumar S and Bhaskaran A. Old Habits Die Hard: Is Coronary Assessment in Ventricular Tachycardia Storm Still Necessary? JACC Clin Electrophysiol. 2023 Jun 20. doi: 10.1016/j.jacep.2023.05.032.
  48. Bhaskaran A, Kumar S. Delving Deeper into the Causes of Sudden Death in the Young-The Importance of Distinguishing “Signal” from “Noise”. Heart Lung Circ. 2024 Jan;33(1):4-6. doi: 10.1016/j.hlc.2024.01.005.
  49. Turnbull S, Kumar S. Fireworks and Fool’s Gold: Early Sites May Not Lead to Fast Success. Heart Lung Circ. 2025 Mar;34(3):203-205. doi: 10.1016/j.hlc.2025.02.101.
  50. De Silva K, Kumar S. Interelectrode Spacing and Ventricular Scar: Finding the “Sweet Spot”. JACC Clin Electrophysiol. 2025 Apr 3:S2405-500X(25)00142-2. doi: 10.1016/j.jacep.2025.02.028. Epub ahead of print.

COMMISSIONED REVIEWS

  1. Kumar S, Chow C, Jan S and Angell B. Rapid literature review on public access to defibrillation. Newtown: The George Institute for Global Health. 2017. A commissioned review by the NSW Health. doi:
  2. Campbell T, Bennett RG, Kotake Y and Kumar S. Updates in Ventricular Tachycardia Ablation. Korean Circ J. 2021 Jan; 51(1):15-42. doi: 10.4070/kcj.2020.0436
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Leading expert in general cardiology as well as heart rhythm disorders. A/Prof Kumar offers 15+ years of experience at the highest level.

A/Prof Kumar welcomes both public and private patients. As a General Cardiologist, and sub-specialist in Electrophysiology, he sees a wide range of patients – from general cardiology patients with minor issues, all the way to more complex presentations such as hearth rhythm disorders and those needing interventional (procedural) cardiology.

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Whether you’re seeking answers to an irregular heart rhythm, needing reassurance or ongoing care, a general cardiology assessment can provide the clarity you need. Early detection and tailored treatment can significantly reduce your risk of heart disease, stroke, and other complications.

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